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Basic Statistics & Probability MCQ

1. In one study, over half of women ages 18-25 would rather be _____ than be fat.

Kicked in the head

Publicly flogged

Run over by a truck

Dragged on the road

Answer

Correct Answer: Run over by a truck

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2.
Which of the following statements are correct with regard to the images within a webpage?

Images cannot be spidered by the search engines.

Important keywords related to the image should be placed in the ALT text.

Images should always be kept close to the top of a webpage.

Image maps should be used while including the images.

Answer

Correct Answer: Important keywords related to the image should be placed in the ALT text.

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3.
This question is based upon the figure shown below

Question:

The formula given above is that of:

Population variance

Population mean

Population standard deviation

Z-score

Answer

Correct Answer: Z-score

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4.
This question is based upon the figure shown below

In the above image it is stated that:

the average of the given data is not 40.

the alternative hypothesis is that the mean of the given data is 40.

the null hypothesis is that the mean value of the given data is 40.

Answer

Correct Answer: the null hypothesis is that the mean value of the given data is 40.

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5.

Which important information does the correlation analysis of variables give about the relationship between the variables?

Type of relationship

Interdependency of relations

Strength of relationship

a & b

a & c

b & c

Answer

Correct Answer: a & c

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6.
This question is based upon the figure shown below

Describe the relationship between the two variables in the above given scatter plot.

Positive

Negative

No correlation

Weak negative

Answer

Correct Answer: Positive

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7.
The following are data collection methods except:

Surveys

Observation

Sampling

Designed experiments

Answer

Correct Answer: Sampling

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8.
The events that are not affected by other outcomes are called:

Probable events

Improbable events

Independent events

None of the above

Answer

Correct Answer: Independent events

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9.
The following are the steps in the process of Cluster sampling. Put them in the right order:

1)Randomly select the needed number of clusters for the sample.

2)Assign the population to different clusters.

3)Include all the population members of the selected cluster in the sample. Alternatively, select only a certain number of population members from each cluster (through simple or systematic random sampling) for the sample.

2,1,3

2,3,1

1,2,3

1,3,2

Answer

Correct Answer: 2,1,3

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10.
The reasons for choosing a sample out of a population are:

Cost limits

Time limits

Easy availability

High reliability

c and d

a and b

Answer

Correct Answer: a and b

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11.
In which of the following fields is ANOVA used to make comparisons amongst groups?

In product research and development.

In education and training.

In human factor analysis.

All of the above

Answer

Correct Answer: All of the above

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12.
The middle point of a data set arranged in an array from the smallest to the largest value is called:

mean

median

mode

Answer

Correct Answer: median

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13.
______takes into account the distance of every point in the scatter plot from the trend line.

Random error term

Slope

Intercept

Dependent variable

Answer

Correct Answer: Random error term

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14.
In which chart is the data organized in a descending order and includes a trend line as well?

Pareto chart

Area chart

Side-by-side bar chart

Scatter plot

Answer

Correct Answer: Pareto chart

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15.
Statistics help in making inferences and drawing conclusions. These conclusions in turn help in:

decision-making

hypothesis testing

data collection

a and b

Answer

Correct Answer: decision-making

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16.
Once a sample is drawn from the population, how close the sample is to the larger population is to be determined. This is known as:

Sampling error

Variance error

Statistical error

Answer

Correct Answer: Sampling error

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17.
A ________ is a graphic representation of data based on paired observations.

scatter plot

pie chart

bar chart

pareto diagram

Answer

Correct Answer: scatter plot

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18.
Which of the following is not a research ethic?

Transparency

Anonymity

Risk of harm

Informed consent

Answer

Correct Answer: Risk of harm

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19.
In marketing research, which measure of central tendency is often used in a set of ordinal data?

Mean

Variance

Mode

Median

Answer

Correct Answer: Median

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20.
The following are the test scores in history for ten students:

61,10,88,37,61,72,55,61,46,22.

Calculate the mode of these test scores.

Answer

Correct Answer: 61

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21.
Find out the median of the following data set:

8126m; 8611m; 7817m; 8172m; 8076m; 8848m; 8598m

7817m

8598m

8172m

8126m

Answer

Correct Answer: 8172m

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22.
It is important to categorize your data and data can be categorized into the following categories:

ordinal

interval

classical

ratio

a,b and d

Answer

Correct Answer: a,b and d

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23.
The idea behind reviewing existing knowledge is:

to select the right research study tools.

to be guided by previous research studies.

to be careful of not repeating the errors of previous studies.

All of the above

Answer

Correct Answer: All of the above

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24.
Ordinal numbers or data are primarily concerned with:

comparisons

rankings

classifications

predictions

Answer

Correct Answer: rankings

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25.
In a set of 40 General Knowledge questions 5 are based on International Relations. In a computer generated test only 30 of these 40 questions will be picked up. What is the probability of at least one of these 5 questions (on International Relations) being picked up randomly out of the selected 30?

0.16

0.26

0.01

Answer

Correct Answer: 0.16

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26.
In correlation analysis, we designate one variable as an independent variable and the other as a dependent variable.

True

False

Answer

Correct Answer: False

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27.
How many types of major sampling methods are there?

Answer

Correct Answer: 2

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28.
In the Sampling Process, soon after identifying the sampling method comes the process of:

determining your sample size

sampling and data collection

reviewing your sampling process

Answer

Correct Answer: determining your sample size

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29.
When the data values are tightly clustered around the mean, the bell shaped curve is:

skewed

flat

steep

None of the above

Answer

Correct Answer: steep

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30.
How is a Type II error symbolized as?

∞

Answer

Correct Answer: ß

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31.
Commonly employed qualitative research methods include:

Focus groups

Case studies

Surveys

a and c

a and b

Answer

Correct Answer: a and b

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32.
Which of the following is not an example of hypothesis?

What percentage of people pass their driving test in the first attempt?

The average age of cell phone users city-wide is 40 years.

The average salary of teachers in the entire school district is $50,000.

A public health official believes that 60% of all elderly people have received flu examination in the previous year.

Answer

Correct Answer: What percentage of people pass their driving test in the first attempt?

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33.
The process in which data about the variables is collected and then predictions are made about future outcome is called:

Regression analysis

Future analysis

Correlation analysis

None of the above

Answer

Correct Answer: Regression analysis

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34.
Which graphical tool is used to arrive at decisions by presenting and comparing a number of competing alternatives?

Contingency table

Bar graph

Decision tree

Answer

Correct Answer: Decision tree

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35.
The advantage(s) of Scientific Research Method is/are:

It investigates the problem exhaustively

It is a systematic, controlled and empirical investigation of hypothesis.

a and b

None of the above

Answer

Correct Answer: a and b

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36.
What will be the potential sampling frame(s) for a survey whose target population is infant children?

medical facilities (such as hospitals and clinics) recording births within the past 12 months.

households whose occupants include infants under 12 months old.

Official school directories

Both a and b

Answer

Correct Answer: Official school directories

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37.
A good research plan should include the following except:

Research Questions

Research Designs

Prior Knowledge

Participants

Answer

Correct Answer: Prior Knowledge

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38.
While accepting or rejecting a null hypothesis , ________ are the regions that help to arrive at a decision.

special regions

borderline regions

critical regions

Answer

Correct Answer: critical regions

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39.
Examples of Measures of central tendency include:

Mean

Range

Variance

None of the above

Answer

Correct Answer: Mean

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40.
The correlation co-efficient quantifies the strength of the relationship between two variables and the value of this co-efficient falls between:

-1.0 and +1.0

+1.0 and +0.81

-1.0 and -0.81

-0.21 and +0.40

Answer

Correct Answer: -1.0 and +1.0

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41.
Cross tabulation of data is possible through the following:

Contingency tables

Scatter plot

Side-by-side bar chart

All of the above

Answer

Correct Answer: Contingency tables

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42.
Probability proves useful:

in understanding the probability of occurrence of an event or a phenomenon.

in deducing larger implications from a given data.

Both a and b

Neither a nor b

Answer

Correct Answer: in deducing larger implications from a given data.

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43.
Cluster sampling and Stratified sampling form part of Probability Sampling Methods.

True

False

Answer

Correct Answer: True

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44.
_________ is one of the basic methods of inferential statistics that helps a researcher determine the difference between a real and a random pattern in a data set.

Hypothesis testing

Population parameters

Regression analysis

Sample testing

Answer

Correct Answer: Hypothesis testing

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45.
Of the three Measures of central tendency, which one is the most sensitive to outliers?

Mean (Arithmetic)

Median

Mode

Answer

Correct Answer: Mean (Arithmetic)

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46.
Trying to learn more about a larger population from a small sample, is an example of:

descriptive analysis

inferential analysis

exploratory analysis

none of the above

Answer

Correct Answer: inferential analysis

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47.
Numerical data can be presented by way of which of the following:

Ordered array

Pareto diagram

Frequency distribution

a&b

a&c

b&c

Answer

Correct Answer: a&c

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48.
Which data category uses numbers to indicate a classification?

Cardinal

Ordinal

Nominal

Parametric

Answer

Correct Answer: Nominal

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49.
In statistical analysis, central tendency points to the clustering of the data around a _____________.

median

central value

mode

point

Answer

Correct Answer: central value

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50.
Statistics can be divided into 2 broad sections. One is Descriptive Statistics, the other is:

Inferential Statistics

Cumulative Statistics

Differential Statistics

Analytical Statistics

Answer

Correct Answer: Inferential Statistics

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51.
The following statements regarding a Hypothesis are true except:

A hypothesis is an educated guess.

It is an assumption based on relationship between two or more variables.

It helps to design your research.

It can be true or false.

Answer

Correct Answer: It helps to design your research.

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52.
When you are figuring out How to collect, process and analyze data, you are:

Designing your research

Analyzing your data

Reporting new findings

Constructing a hypothesis

Answer

Correct Answer: Designing your research

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53.
Stem and leaf display is an example of:

Frequency distribution

Ordered array

Pareto diagram

None of the above

Answer

Correct Answer: Ordered array

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54.
The components of Simple Linear Regression model include the following except:

The slope

The random error term

The intercept

The dependent variable

Answer

Correct Answer: The dependent variable

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55.
Standard deviation is the most common measure of __________.

dispersion

central tendency

clustering

Answer

Correct Answer: dispersion

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56.
The population you are interested in studying is called:

Sample population

Item population

Target population

Answer

Correct Answer: Target population

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57.
What is the probability of occurrence of a Type I error referred to as?

Level of significance

Level of error

Level of probability

Level of acceptance

Answer

Correct Answer: Level of significance

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58.
Statistics is a branch of ______

psychology

geography

mathematics

social science

Answer

Correct Answer: mathematics

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59.
Probability can be determined by:

Subjective Evidence

Prior Knowledge

Future Knowledge

a and b

a and c

Answer

Correct Answer: a and b

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60.
Which of these can be used as source(s) of data collection?

Magazines and Newspapers

Census Bureau

Television

a & b

Answer

Correct Answer: a & b

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61.
Which type of sampling method solicits the opinions of pre-selected experts?

Convenience sampling

Judgment sampling

Stratified sampling

Answer

Correct Answer: Judgment sampling

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62.
The relationship between two variables is of two types. One is Linear, the other is:

Positive

Curvilinear

Negative

Answer

Correct Answer: Curvilinear

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63.
A sample of a population is:

a subset of the population you are studying.

a set of entities concerning which statistical inferences are to be drawn.

a set of potential measurements or values.

a subset of potential future subjects.

Answer

Correct Answer: a subset of the population you are studying.

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64.
While following the Scientific Research steps, a researcher has to construct a hypothesis soon after defining the problem

True

False

Answer

Correct Answer: False

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65.
Which of the following form(s) part of descriptive analysis?

Collecting raw data

Summarizing raw data

Analyzing raw data

All of the above

Answer

Correct Answer: All of the above

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66.
When a person conducts analysis using data he or she has not collected, the source of such data is called:

Primary source

Secondary source

Firsthand source

Basic data source

Answer

Correct Answer: Secondary source

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67.
There are two ways to present categorical data. One is by way of graphs, the other is by way of ____

charts

pie diagram

histograms

tables

Answer

Correct Answer: tables

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68.
The _____ is a useful tool for assessing whether the means of two groups of variable are statistically different from each other.

sample mean

T-test

null hypothesis

alternative hypothesis

Answer

Correct Answer: T-test

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69.
When a researcher doesn't know much about a certain problem and wants to gain more information about it, which research design will he use?

Exploratory

Descriptive

Casual

Answer

Correct Answer: Exploratory

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70.
Arranging your target population in an ordered scheme from which participants or items are chosen at regular intervals is an example of:

Simple random sampling

Systematic sampling

Stratified sampling

Answer

Correct Answer: Systematic sampling

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71.
A study finds that children who spend more hours in TV viewing score lower class grades in school. This correlation is an example of:

Positive correlation

Negative correlation

No correlation

Answer

Correct Answer: Negative correlation

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72.
______ is the most frequent value that is present in your data.

Standard deviation

Mean

Mode

None of the above

Answer

Correct Answer: Mode

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73.
______ is one way to understand the relationship between two variables that occur at the same time.

Regression analysis

Correlation

Variance

Sampling

Answer

Correct Answer: Correlation

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74.
Population parameters include the following except:

population mean

population variance

population standard deviation

population hypothesis

Answer

Correct Answer: population hypothesis

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75.
Prior experience and situational analysis are important in making decisions when a person does not have enough information to calculate the probability of occurrence of an event.

True

False

Answer

Correct Answer: True

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76.
The Causal Research design is used when the ______ factor about some phenomenon or issue is being researched.

Why

How

What

When

Answer

Correct Answer: Why

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77. Is it true that nCr = nC(n-r) ?

yes

Answer

Correct Answer: yes

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78. Suppose E and F are events in a sample space S. Suppose further that E has probability .5, F has probability .6, and the intersection of E and F has probability .2. Find the probability of the union of E and (the complement of F).

Answer

Correct Answer: .6

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79. Suppose E and F are independent events in a sample space S. Suppose further that E has probability .3 and F has probability .4. What is the probability of the union of E and F?

.58

.12

Answer

Correct Answer: .58

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80. What is the cumulative probability at -1 standard deviation for a normal distribution?

2.28%

50.00%

84.13%

34.13%

15.87%

Answer

Correct Answer: 15.87%

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81. Which of the following is NOT essential for multiple regression modeling?

The sample population must be derived from a normally distributed population.

The model must be linear in parameters.

There must be no perfect collinearity among independent variables.

There must be more observations than independent variables to have enough degrees of freedom to make estimates.

Answer

Correct Answer: The sample population must be derived from a normally distributed population.

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82. A card is drawn randomly from a deck of ordinary playing cards. You win $10 if the card is a spade or an ace. What is the probability that you will win money from playing the game once?

None of these.

4/13

13/52

17/52

1/13

Answer

Correct Answer: 4/13

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83. Suppose X and Y are independent random variables. The variance of X is equal to 16; and the variance of Y is equal to 9. Let Z = X - Y. What is the standard deviation of Z?

2.65

Not enough information to be able to answer the question.

Answer

Correct Answer: 5

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84. Suppose E and F are events in a sample space S. Suppose further that E has probability .3, F has probability .4, and the intersection of E and F has probability .2. Find the probability of the intersection of E and (the complement of F).

Answer

Correct Answer: .1

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85. Suppose E and F are events in a sample space S. Suppose further that E has probability .8 and F has probability .9. What is the smallest possible value for the probability of the intersection of E and F?

Answer

Correct Answer: .7

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86. P(A|B)=.6 P(A)=.3 P(B)=.4 What is P(B|A)?

.75

.90

.45

.60

Answer

Correct Answer: .8

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87. What is the probability that a coin will land on the same side when flipped twice?

.33

.125

.25

.66

Answer

Correct Answer: .5

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88. Event A and Event B are independent and mutually exclusive. True or False: The probability of A must be 0 or the probability of B must be 0.

True

False

Answer

Correct Answer: True

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89. A coin is tossed three times. What is the probability that it lands on heads exactly one time?

0.125

0.333

0.250

0.500

0.375

Answer

Correct Answer: 0.375

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90. P(X|Y)=.5 P(X)=.2 P(Y)=.4 What is P(X and Y),

.08

Answer

Correct Answer: .2

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91. What power is used in the formula for kurtosis?

Answer

Correct Answer: 4

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92. Which of the following numbers (measures of kurtosis of a distribution) would represent a leptokurtic distribution?

Answer

Correct Answer: 4

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93. Which of the following would be appropriate for a t-test?

Determining whether an anti-cancer drug increases the number of patients who survive more than one year

Determining whether the weight of all male golden eagles in a population is statistically different from that of female eagles

Determining if a group of people who slept 4 hours before a test will score lower than a group of people who slept 8 hours before a test.

Determining which of several medicines has the greatest effect on cell growth

Answer

Correct Answer: Determining if a group of people who slept 4 hours before a test will score lower than a group of people who slept 8 hours before a test.

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94. A survey was conducted to find the average weight of students living in the dorms or a university. To help improve the accuracy of the study, an equal number of students were randomly selected from each dorm for the sample. This sample is an example of what?

Block Design

Experiment

Simple Random Sample

Stratified Random Sample

Answer

Correct Answer: Simple Random Sample

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95. The variance of X is 5 and the variance of Y is 8. What is the variance of X+Y?

Not enough information.

Answer

Correct Answer: Not enough information.

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96. Which of the assumptions is not one of the assumptions for creating a linear regression model (ie. Gauss-Markov Assumptions)?

There must exist a method of random sampling in order for our model to have any internal and external validity.

The model estimating the dependent variable must have independent variables that are linear in parameters.

The residuals must have a variance that depends on the values in the explanatory variable.

The distribution of the residuals should have a mean of zero.

Answer

Correct Answer: The residuals must have a variance that depends on the values in the explanatory variable.

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97. Which of the following numbers (measures of kurtosis of a distribution) would represent a platykurtic distribution?

3.5

Answer

Correct Answer: 2

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98. What is another form of expressing beta1 in a simple linear regression? y=dependent variable x=independent variable

cov(xy)/var(x)

cov(xy)/var(y)

E(x)-E(x)^2

var(x)^2/var(x)var(y)

Answer

Correct Answer: cov(xy)/var(x)

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99. Which statistic is not a measure of effect size?

Eta squared

partial omega squared

omega squared

F-statistic

R squared

Answer

Correct Answer: F-statistic

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100. What formula is used to determine the probability of a series of outcomes WITH replacement?

Hypergeometric

Gamma distribution probability

Gaussian probability

Cumulative probability

Gaussian or Cumulative probability

Answer

Correct Answer: Hypergeometric

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101. What is the probability of drawing an Ace from a deck of cards that includes the two Jokers?

1/13

2/27

1/54

None of these

1/14

Answer

Correct Answer: 2/27

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102. Which of these linear regression models is quadratic?

Y = B0 + B1X1 + B2(X1)^2

Y = B0 + B1(X1*X2)^2

Y = B0 + B1(X1)^2

Y = B0 + B1X1 + B2(X2)^2

Answer

Correct Answer: Y = B0 + B1X1 + B2(X1)^2

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103. What is a Type II error?

Failure to reject the null hypothesis when it is false

Failure to reject the alternative hypothesis when it is false

Rejecting the null hypothesis when it is true

Failure to reject the alternative hypothesis when it is true

Rejecting the alternative hypothesis when it is true

Answer

Correct Answer: Failure to reject the null hypothesis when it is false

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104. What does R^2 (R-Squared) calculate?

The coefficient of variation^2

The squared covariance

The slope of the regression

The closeness of a regression to the underlying data

The point where the regression crosses the Y axis

Answer

Correct Answer: The closeness of a regression to the underlying data

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105. What is the formula for the Pearsonian Coefficient of Skewness?

2*(population mean - population mode) / Variance

3*(population mean - population mode) / Variance

3*(population mean - population mode) / Standard deviation

5*(population mean - population mode) / Standard deviation

5*(population mean - population mode) / Variance

Answer

Correct Answer: 3*(population mean - population mode) / Standard deviation

Note: This Question is unanswered, help us to find answer for this one

106. What is the coefficient of variation?

Normalized measure of dispersion of a probability distribution

Mean^2

Skewness + Kurtosis

Kurtosis minus standard deviation

Standard Deviation

Answer

Correct Answer: Normalized measure of dispersion of a probability distribution

Note: This Question is unanswered, help us to find answer for this one

107. Let X follow a Poisson distribution with a rate parameter of 7. What is Var(X)?

1/49

1/7

Answer

Correct Answer: 7

Note: This Question is unanswered, help us to find answer for this one

108. The variance of X is 3. Y=3X. What is the variance of Y?

Not enough information.

Answer

Correct Answer: 9

Note: This Question is unanswered, help us to find answer for this one

109. Which should you use to analyze a continuous dependent variable against a categorical independent variable?

Linear Probability Model

ANOVA

Probit Regression

Logistics Regression

Answer

Correct Answer: ANOVA

Note: This Question is unanswered, help us to find answer for this one

110. M=L+[d1/(d1+d2)], The M in the above equation represent?

The difference between the frequency of the modal class and the frequency of the class before it.

The modal item in a grouped distribution

The range.

The modal item of an ungrouped distribution.

The mean of a distribution

Answer

Correct Answer: The modal item in a grouped distribution

Note: This Question is unanswered, help us to find answer for this one

111. If I tossed a fair coin 3 times, what is the probability of it landing on tails only once?

3/8

1/8

1/2

1/4

Answer

Correct Answer: 3/8

Note: This Question is unanswered, help us to find answer for this one

112. For an airline, many times small cities have limited flights that go into their airports. To get a flight to Columbia, SC you must go through one of three cities: Raleigh, NC, Atlanta, GA, or Charlotte, NC. Two customers from Orlando, FL are trying to get to Columbia, SC with only one stop (one of the three above mentioned cities). Assume that they are equally likely to go through any of the above cities. What is the probability one of the customers fly through Charlotte, NC, while the other does not fly through Charlotte, NC?

4/9

1/3

2/3

2/9

Answer

Correct Answer: 4/9

Note: This Question is unanswered, help us to find answer for this one

113. What is the probability of rolling a seven on two six-sided dice?

None of these

1/10

1/7

1/12

1/6

Answer

Correct Answer: 1/6

Note: This Question is unanswered, help us to find answer for this one

114. What is the probability that two six-sided dice will roll the same number?

1/12

1/10

None of these

1/36

1/6

Answer

Correct Answer: 1/6

Note: This Question is unanswered, help us to find answer for this one

115. Suppose E and F are independent events in a sample space S. Suppose further that E has probability .3 and F has probability .4. What is the probability of the intersection of E and F?

.12

Answer

Correct Answer: .12

Note: This Question is unanswered, help us to find answer for this one

116. Chi-square is used predominantly in _______ statistics.

non-parametric

none of these

parametric

descriptive

Answer

Correct Answer: non-parametric

Note: This Question is unanswered, help us to find answer for this one

117. How do you calculate the standard error of the mean? (obs. = observations, sqrt = Square Root)

Standard deviation/ sqrt(number of obs.)

Variance / number of obs.

Sqrt(Variance/sqrt(number obs.))

Sum(obs. - mean)^2 / (number of obs.)

Answer

Correct Answer: Standard deviation/ sqrt(number of obs.)

Note: This Question is unanswered, help us to find answer for this one

118. What is synonymous with the correlation coefficient?

Sigma

R-Squared

Answer

Correct Answer: R

Note: This Question is unanswered, help us to find answer for this one

119. Which of the following would be appropriate for ANOVA?

Determining whether the average food delivery time from restaurant A is shorter than restaurant B

Determining which of several training programs yields the highest mean performance score on the exit exam

Determining whether an anti-cancer drug increases the number of patients who survive more than one year

Determining whether the percentage of female voters is statistically different than the prior year.

Answer

Correct Answer: Determining which of several training programs yields the highest mean performance score on the exit exam

Note: This Question is unanswered, help us to find answer for this one

120. For an airline, many times small cities have limited flights that go into their airports. To get a flight to Columbia, SC you must go through one of three cities: Raleigh, NC, Atlanta, GA, or Charlotte, NC. Two customers from Orlando, FL are trying to get to Columbia, SC with only one stop (one of the three above mentioned cities). Assume that they are equally likely to go through any of the above cities. What is the probability neither of the customers fly through Charlotte, NC?

1/3

4/9

2/3

2/9

Answer

Correct Answer: 4/9

Note: This Question is unanswered, help us to find answer for this one

121. What is the expected value of rolling an unbiased die (6 sided)?

3.0

4.5

2.5

3.5

1.5

Answer

Correct Answer: 3.5

Note: This Question is unanswered, help us to find answer for this one

122. What is homoskedastic?

I do not know

There is no adjustment factor (e.g. epsilon)

The adjustment factor doesn't change (e.g. epsilon)

The adjustment factor changes (e.g. epsilon)

Answer

Correct Answer: The adjustment factor doesn't change (e.g. epsilon)

Note: This Question is unanswered, help us to find answer for this one

123. Suppose E and F are events in a sample space S. Suppose further that E has probability .8 and F has probability .9. What is the largest possible value for the probability of the intersection of E and F?

Answer

Correct Answer: .8

Note: This Question is unanswered, help us to find answer for this one

124. Suppose E and F are mutually exclusive events in a sample space S. Suppose further that E has probability .3 and F has probability .4. What is the probability of the intersection of E and F?

.12

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

125. Which of the following is NOT a commonly used estimator in determining the parameters of an unknown probability density function?

Fourier transform

Cramér–Rao bound

Bayes least squared error

Maximum likelihood

Method of moments

Answer

Correct Answer: Fourier transform

Note: This Question is unanswered, help us to find answer for this one

126. What is synonymous with the coefficient of determination?

R-Squared

Sigma

Answer

Correct Answer: R-Squared

Note: This Question is unanswered, help us to find answer for this one

127. For a random variable X, E[X]=3 and E[X^2]=14. Var[X]=?

Answer

Correct Answer: 5

Note: This Question is unanswered, help us to find answer for this one

128. The preseason odds that the Hartford Whalers will win The Stanley Cup Championship are 1/4, and the odds are the same for the California Golden Seals. What is the probability that BOTH will win the championship?

7/16 = 0.4375

1/16 = 0.0625

1/4 = 0.25

1/2 = 0.5

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

129. What is the kurtosis of a normal distribution?

4.5

2.5

3.5

Answer

Correct Answer: 3

Note: This Question is unanswered, help us to find answer for this one

130. What is the cumulative probability at +1 standard deviation, for a random variable with normal distribution?

84.13%

50.00%

2.28%

15.87%

34.13%

Answer

Correct Answer: 84.13%

Note: This Question is unanswered, help us to find answer for this one

131. A card is drawn randomly from an ordinary deck of playing cards. You win a prize if the card is a heart or the card is an ace. What is the probability that you will win the prize?

13/52

1/13

16/52

17/52

Answer

Correct Answer: 16/52

Note: This Question is unanswered, help us to find answer for this one

132. The variance of X is 15. Y=X+5. What is the Variance of Y?

17.5

Not enough information to determine the Variance of Y.

Answer

Correct Answer: 15

Note: This Question is unanswered, help us to find answer for this one

133. Find the z-score: mean = 6, standard dev. = 2, observation = 7

-1.5

-.5

1.5

Answer

Correct Answer: .5

Note: This Question is unanswered, help us to find answer for this one

134. What are the characteristics of the f-distribution.

It is skewed to the right, and we can only use it to perform one-tailed tests.

It is skewed to the right, and we can perform two-tailed tests.

It is normally distributed, and we can perform two-tailed tests.

It is skewed to the left, and we can perform two-tailed tests.

Answer

Correct Answer: It is skewed to the right, and we can only use it to perform one-tailed tests.

Note: This Question is unanswered, help us to find answer for this one

135. What power is used in the formula for skewness?

Answer

Correct Answer: 3

Note: This Question is unanswered, help us to find answer for this one

136. Suppose E and F are events in a sample space S. Suppose further that E has probability .2, F has probability .6, and the intersection of E and F has probability .1. What is the probability of the union of E and F?

.68

Answer

Correct Answer: .7

Note: This Question is unanswered, help us to find answer for this one

137. In hypothesis testing, which of the following statements is always true?

The P-value is a test statistic.

The P-value is computed from the significance level.

The P-value is the parameter in the null hypothesis.

The P-value is a probability.

Answer

Correct Answer: The P-value is a probability.

Note: This Question is unanswered, help us to find answer for this one

138. Suppose A is always 3. Var(B)=4. What is Var(A+B)?

Not enough information.

Answer

Correct Answer: 4

Note: This Question is unanswered, help us to find answer for this one

139. What is derived from the third moment of distribution?

Kurtosis

Variance

Skewness

Standard Deviation

Mean

Answer

Correct Answer: Skewness

Note: This Question is unanswered, help us to find answer for this one

140. Where would the outliers be if a distribution had a skewness of -1?

No outliers

Right

Down

Left

Answer

Correct Answer: Left

Note: This Question is unanswered, help us to find answer for this one

141. Say 2 events satisfy the following equation: P(A intersect B) = P(A) x P(B). We say that events A and B are __.

Mutually exclusive

Disjoint

Independent

Dependent

Answer

Correct Answer: Independent

Note: This Question is unanswered, help us to find answer for this one

142. P(A)*P(B)=P(A and B) What can you conclude about A and B?

They are independent.

They are neither independent nor mutually exclusive.

They are mutually exclusive.

They are independent and mutually exclusive.

Answer

Correct Answer: They are independent.

Note: This Question is unanswered, help us to find answer for this one

143. The median grade on a midterm exam in a math class of 60 students is 85. The teacher gives an additional 5 bonus points to the 3 students who scored the highest on the exam. What is the new median grade for the class?

Not enough information.

Answer

Correct Answer: 85

Note: This Question is unanswered, help us to find answer for this one

144. If you have a hypothesis test with a significance level of 0.05 and a p-value of 0.01, what is the result of your hypothesis test?

You fail to reject the null hypothesis

You reject the null hypothesis

You accept the null hypothesis

Not enough information.

Answer

Correct Answer: You reject the null hypothesis

Note: This Question is unanswered, help us to find answer for this one

145. P(n,r) is equal to...

n!/(r!(n-r)!)

n!r!

n!/r!

n!/(n-r)!

Answer

Correct Answer: n!/(n-r)!

Note: This Question is unanswered, help us to find answer for this one

146. When do you fail to reject the null hypothesis?

P-Value is > alpha (level of significance)

P-Value is < alpha (level of significance)

Answer

Correct Answer: P-Value is > alpha (level of significance)

Note: This Question is unanswered, help us to find answer for this one

147. Which of the following is A test of normality?

Kolmogrov-Smirnov Test of Normality

Test of Data Normality

The Standard Test of Normality

Time Series Test of Normality

Marx's Test of Normality

Answer

Correct Answer: Kolmogrov-Smirnov Test of Normality

Note: This Question is unanswered, help us to find answer for this one

148. Which of the following statements are true about confidence intervals for means? 1. The center of the confidence interval is always 0. 2. The bigger the confidence interval, the smaller the margin of error. 3. The bigger your sample, the smaller the margin of error.

2 only

3 only

1 and 2 only

1 only

Answer

Correct Answer: 3 only

Note: This Question is unanswered, help us to find answer for this one

149. Symbolism: What does the Greek letter mu represent (without any other symbols) in statistics?

Population mean

None of the other options

Sample standard deviation

Population standard deviation

Sample mean

Answer

Correct Answer: Population mean

Note: This Question is unanswered, help us to find answer for this one

150. C(n,r) is equal to...

n!/r!

n!/(r!(n-r)!)

n!r!

n!/(n-r)!

Answer

Correct Answer: n!/(r!(n-r)!)

Note: This Question is unanswered, help us to find answer for this one

151. Which of the following is a characteristic of an F-distribution?

No no lower or upper bound

Right Skewed

Bimodal

Symmetric

Answer

Correct Answer: Right Skewed

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152. A manager of a large bank wants to compute the average interest rates across all bonds that the bank invests in. The manager randomly sampled 127 bonds that the bank invests in and calculated the average interest rate over the past year of the sample was 2.47%. What is the parameter of interest in this study?

The 127 bonds used in the calculation.

2.47%

The average interest rate of all bonds that the bank invests in.

All bonds that the bank invests in.

Answer

Correct Answer: The average interest rate of all bonds that the bank invests in.

Note: This Question is unanswered, help us to find answer for this one

153. A bag contains 4 balls (2 red and 2 blue). You pull out one ball at a time without replacement. What is the probability that the fourth ball chosen is a red ball?

9/16

1/2

5/12

7/12

2/3

Answer

Correct Answer: 1/2

Note: This Question is unanswered, help us to find answer for this one

154. The center line inside a box plot typically represents the _____ in any instance.

2nd Percentile

Median of the distribution

Inter-quartile Range

Average of the distribution

Answer

Correct Answer: Median of the distribution

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155. Suppose you have generated this model to predict income: Income = 10 + .5(Years of Education), units are in thousands, ie 10.5 = $10,500. Interpret Beta1.

For every additional year of education, income is expected to increase by $500.

For every additional year of education, income is expected to increase by $10,500.

At zero years of education, income is expected to be $10,000.

At 5 years of education, income is expected to be $25,000.

Answer

Correct Answer: For every additional year of education, income is expected to increase by $500.

Note: This Question is unanswered, help us to find answer for this one

156. What is the formula for the variance of a population?

SQRT( SUM(((x - sample mean)^3) / Number of observations))

SUM(((observation - sample mean)^2) / Number of observations)

SQRT( SUM)((x - sample mean)^2) / Number of observations))

SUM((( - sample mean)^3) / Number of observations)

SUM((observation - sample mean) / Number of observations)

Answer

Correct Answer: SUM(((observation - sample mean)^2) / Number of observations)

Note: This Question is unanswered, help us to find answer for this one

157. Which one of these variables is a binomial random variable?

number of women taller than 68 inches in a random sample of 5 women

number of CDs a randomly selected person owns

time it takes a randomly selected student to complete a multiple choice exam

number of textbooks a randomly selected student bought this term

Answer

Correct Answer: number of women taller than 68 inches in a random sample of 5 women

Note: This Question is unanswered, help us to find answer for this one

158. Which of the following would be appropriate for a z-test?

Determining whether the life expectancy of women in a population is statistically different from that of men

Determining if a small set of pieces of oak firewood burn longer than pine firewood

Determining whether regular exercise decreases the number of new heart disease cases by more than 10% in a year

Answer

Correct Answer: Determining whether the life expectancy of women in a population is statistically different from that of men

Note: This Question is unanswered, help us to find answer for this one

159. Which of the following statements are true? 1. Categorical variables are the same as qualitative variables. 2. Categorical variables are the same as quantitative variables. 3. Quantitative variables can be continuous variables.

1 only

1 and 3 only

3 only

2 only

Answer

Correct Answer: 1 and 3 only

Note: This Question is unanswered, help us to find answer for this one

160. _____ data is an example of nonmetric data.

Quantative

Ordinal

Sample

Parametric

Answer

Correct Answer: Ordinal

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161. What is the first moment of distribution?

Mean

Standard Deviation

Skewness

Variance

Kurtosis

Answer

Correct Answer: Mean

Note: This Question is unanswered, help us to find answer for this one

162. Suppose c is a constant number. Calculate var(c).

c^2

c^2 - c

c^2+c

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

163. The probability of a discrete value in a continuous distribution is equal to __?

-1

.99

0.5

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

164. Suppose E and F are mutually exclusive events in a sample space S with probabilities .4 and .3 respectively. What is the probability of their union?

Answer

Correct Answer: .7

Note: This Question is unanswered, help us to find answer for this one

165. What is the median of the following 5 numbers? 10, 2, 4, 3, 1

Answer

Correct Answer: 3

Note: This Question is unanswered, help us to find answer for this one

166. Which one of these variables is a continuous random variable?

The time it takes a randomly selected student to complete an exam.

The number of tattoos a randomly selected person has.

The number of women taller than 68 inches in a random sample of 5 women.

The number of correct guesses on a multiple choice test.

Answer

Correct Answer: The time it takes a randomly selected student to complete an exam.

Note: This Question is unanswered, help us to find answer for this one

167. Experts rank athletic teams 1 through 10. This is an example of ______ data.

discrete

categorical

quantative

ordinal

Answer

Correct Answer: ordinal

Note: This Question is unanswered, help us to find answer for this one

168. What is derived from the second moment of distribution?

Mean

Skewness

Pearson's Coefficient of Kurtosis

Variance

Kurtosis

Answer

Correct Answer: Variance

Note: This Question is unanswered, help us to find answer for this one

169. In a probability distribution, the second central moment can be another term for which of the following?

Skewness

Average

Kurtosis

Variance

Answer

Correct Answer: Variance

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170. When does a Type I error occur?

None of the other choices

All of the other choices

You reject the null hypothesis when it is true

There is no such term as a "Type I Error"

You fail to reject the null hypothesis when it is false

Answer

Correct Answer: You reject the null hypothesis when it is true

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171. What is the most commonly used statistical measure of spread in a normally-distributed population?

mean

variance

standard deviation

covariance

z-score

Answer

Correct Answer: standard deviation

Note: This Question is unanswered, help us to find answer for this one

172. Interpret an R-squared coefficient of .6 for a simple linear regression.

There is no interpretation for the R-squared value.

60% of the variability in our dependent variable can be explained by our independent variable.

This is an indicator that there must be a moderate positive correlation between both the dependent and independent variables.

We can be 60% certain that there is a causal relationship between our dependent and independent variables.

Answer

Correct Answer: 60% of the variability in our dependent variable can be explained by our independent variable.

Note: This Question is unanswered, help us to find answer for this one

173. Which of the following is an example of mutually exclusive events?

Having it rain on the same day that the sun comes out in the same city

Ordering a burger at a fast food restaurant and ordering fries at that same restaurant

Having one product off the assembly line be defective, but another product on that same assembly line work properly.

Being late to a meeting and being early to the same meeting

Answer

Correct Answer: Being late to a meeting and being early to the same meeting

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174. What is the probability of rolling a fair dice and getting an even number and flipping a fair coin getting a head?

0.25

0.75

0.5

Answer

Correct Answer: 0.25

Note: This Question is unanswered, help us to find answer for this one

175. The average price of a car in a used car lot is $18,000. These prices are Normally distributed with a standard deviation of $3,000. What is the probability that any random car is below $18,000?

68%

50%

95%

42%

Answer

Correct Answer: 50%

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176. The variable X is the value of an uneven dice after one roll. It produced the following probability distribution P(X): P(1) = 0.05 P(2) = 0.28 P(3) = 0.12 P(4) = 0.23 P(5) = ? P(6) = ? What is the probability that X = 2 or X = 3?

0.28

0.45

0.4

0.12

Answer

Correct Answer: 0.4

Note: This Question is unanswered, help us to find answer for this one

177. The variable X is the value of an uneven dice after one roll. It produced the following probability distribution P(X): P(1) = 0.05 P(2) = 0.28 P(3) = 0.12 P(4) = 0.23 P(5) = ? P(6) = ? What is the probability that X = 5 or X = 6?

0.42

0.23

0.55

0.32

Answer

Correct Answer: 0.32

Note: This Question is unanswered, help us to find answer for this one

178. How can you convert a standard deviation to a variance?

Take the cubed root of the standard deviation

Square the standard deviation

Take the square root of the standard deviation

Variance = standard deviation

Take the log of the standard deviation

Answer

Correct Answer: Square the standard deviation

Note: This Question is unanswered, help us to find answer for this one

179. Which plot is best use to display the relationship between a continuous dependent variable against a continuous independent variable

Scatter plot

Box Plot

Bar Chart

None of these

Histogram

Answer

Correct Answer: Scatter plot

Note: This Question is unanswered, help us to find answer for this one

180. Symbolism: What does the x-bar represent (without any other symbols) in statistics?

Population mean

Sample standard deviation

None of the other options

Sample mean

Population standard deviation

Answer

Correct Answer: Sample mean

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181. How do you calculate the Z-Score?

= observation + standard deviation

= (observation - sample mean) / standard deviation

= standard error of the mean / standard deviation

= observation + standard deviation / standard error of the mean

= observation - standard deviation

Answer

Correct Answer: = (observation - sample mean) / standard deviation

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182. Suppose a fair die is tossed twice. What is the probability of rolling two fours?

1/6/2013

2/36

1/36

2/6/2013

Answer

Correct Answer: 1/36

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183. What is the probability of rolling a fair dice and getting a 1 and flipping a fair coin getting a head?

1/12

1/6

3/12

1/2

Answer

Correct Answer: 1/12

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184. A ______ is a numerical characteristic of a population

None of these

185. Where would the outliers be if a distribution had a skewness of +50?

No outliers

Right

Left

Far left

Far right

Answer

Correct Answer: Far right

Note: This Question is unanswered, help us to find answer for this one

186. What is the difference between the mean and the median?

Median is not affected by skewness of the distribution

Both are always equal

Mean is always greater than the Median

Mean is not effected by skewness of the distribution

Answer

Correct Answer: Median is not affected by skewness of the distribution

Note: This Question is unanswered, help us to find answer for this one

187. _____ are collections of observations.

Random variables

Data

Expected values

Populations

Answer

Correct Answer: Data

Note: This Question is unanswered, help us to find answer for this one

188. Symbolism: What does the small sigma represent (without any other symbols) in statistics?

Mean

Skewness

Expected Value

Standard Deviation

Variance

Answer

Correct Answer: Standard Deviation

Note: This Question is unanswered, help us to find answer for this one

189. How is P(A|B) interpreted?

The probability that event A or event B happens

The probability event A happens given that event B has happened

The probability event A happens given that event B did not happen

The probability event B happens given that event A has happened

Answer

Correct Answer: The probability event A happens given that event B has happened

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190. Suppose E is an event in a sample space S with probability .3. What is the probability of the complement of E?

Answer

Correct Answer: .7

Note: This Question is unanswered, help us to find answer for this one

191. Where would the outliers be if a distribution had a skewness of +1?

Right

Left

Far right

No outliers

Far left

Answer

Correct Answer: Right

Note: This Question is unanswered, help us to find answer for this one

192. You calculate the standard deviation of a data set and find that it is -1.23. From this you can determine which of the following is true?

The mean must be negative.

You made an arithmetic mistake because standard deviation cannot be negative.

Every value in the data set is the same.

All of the values in the data set are negative.

Answer

Correct Answer: You made an arithmetic mistake because standard deviation cannot be negative.

Note: This Question is unanswered, help us to find answer for this one

193. What is the probability of rolling a fair dice and getting an even number?

1/2

4/6

1/6

1/3

Answer

Correct Answer: 1/2

Note: This Question is unanswered, help us to find answer for this one

194. Which of the following is not a measure of spread?

Variance

Range

Upper Quartile

Standard Deviation

Answer

Correct Answer: Upper Quartile

Note: This Question is unanswered, help us to find answer for this one

195. Over the last 360 days of winter in Raleigh, NC (5 winters) we have had snow on 36 days. What is the probability that we will have snow on any random winter day this year?

0.05

0.1

0.01

0.2

Answer

Correct Answer: 0.1

Note: This Question is unanswered, help us to find answer for this one

196. Where would the outliers be if a distribution had a skewness of -50?

Far left

Left

Right

Far right

No outliers

Answer

Correct Answer: Far left

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197. Bob is a high school basketball player, who is a 72% free throw shooter. Bob has missed his first four free throws of the game. What is the probability that Bob makes his fifth free throw?

72%

90%

100%

Answer

Correct Answer: 72%

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198. Using previous games to predict the score of a game is an example of ________ statistics.

inferential

descriptive

incomplete

None of these

Answer

Correct Answer: inferential

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199. How can you convert a variance to a standard deviation?

Variance = standard deviation

Take the square root of the variance

Take the cubed root of the variance

Take the log of the variance

Square the variance

Answer

Correct Answer: Take the square root of the variance

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200. A forestry researcher recorded many variables on the trees of a large forest. These variables include the height (in meters), the diameter (in centimeters), the species (pine, oak, etc.), and if the tree had Dutch Elm disease. In this study which variables that were recorded were quantitative?

Only species and height.

Only height.

Only height and diameter.

All of the variables.

Answer

Correct Answer: Only height and diameter.

Note: This Question is unanswered, help us to find answer for this one

201. Let A be a normal distribution with a mean of 3 and B be a normal distribution with a mean of 17. What is the mean of A+B?

Answer

Correct Answer: 20

Note: This Question is unanswered, help us to find answer for this one

202. Which of the following is NOT a characteristic of a Normal distribution?

Defined completely by mean and variance

Unimodal

Right Skewed

Symmetric

Answer

Correct Answer: Right Skewed

Note: This Question is unanswered, help us to find answer for this one

203. Which of the following is a measure of spread?

Mean

Lower Quartile

Median

Range

Answer

Correct Answer: Range

Note: This Question is unanswered, help us to find answer for this one

204. The median grade on a midterm exam in a math class is 72. The teacher feels this is too low, so they award 10 extra points to every student in the class. What is the new median grade for the class?

Not enough information.

Answer

Correct Answer: 82

Note: This Question is unanswered, help us to find answer for this one

205. Your college professor standardizes everyone's test scores. Your standardized score is -1.35. Which of the following statements is true?

You scored within one standard deviation of the average test score.

Your test score was above the average.

Your test score was below the average.

Your test score had the highest standard deviation.

Answer

Correct Answer: Your test score was below the average.

Note: This Question is unanswered, help us to find answer for this one

206. The, "null hypothesis," refers to

That the relationship depends on other factors

That there is a minor relationship between two phenomena

That there is a significant relationship between two phenomena

that there is no relationship between two phenomena

Answer

Correct Answer: that there is no relationship between two phenomena

Note: This Question is unanswered, help us to find answer for this one

207. Two coins are tossed, what is the probability that two heads are obtained?

.75

.25

.125

Answer

Correct Answer: .25

Note: This Question is unanswered, help us to find answer for this one

208. The average grade on a midterm exam in a math class is 72. The teacher feels this is too low, so they award 10 extra points to every student in the class. What is the new average grade for the class?

Not enough information.

Answer

Correct Answer: 82

Note: This Question is unanswered, help us to find answer for this one

209. What is the skewness of a normal distribution?

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

210. What power is used in the formula for variance?

Answer

Correct Answer: 2

Note: This Question is unanswered, help us to find answer for this one

211. True or false? Qualitative data is strictly numerical.

False

True

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

212. What is the median of the following 5 numbers? 1, 2, 3, 4, 10

Answer

Correct Answer: 3

Note: This Question is unanswered, help us to find answer for this one

213. A normal distribution generally takes the form of _______.

square ruit

bell curve

None of these

asymptote

Answer

Correct Answer: bell curve

Note: This Question is unanswered, help us to find answer for this one

214. What is the mean of: 5, 10, 15?

Answer

Correct Answer: 10

Note: This Question is unanswered, help us to find answer for this one

215. The Square of the standard deviation is called

Covariance

Variance

Mean

Squared Distribution

Answer

Correct Answer: Variance

Note: This Question is unanswered, help us to find answer for this one

216. The difference between the highest and lowest scores is called the ______.

range

mean

sample

mode

Answer

Correct Answer: range

Note: This Question is unanswered, help us to find answer for this one

217. You flip an unbiased coin one time - what is the probability of getting tails?

50%

25%

Cannot determine

75%

100%

Answer

Correct Answer: 50%

Note: This Question is unanswered, help us to find answer for this one

218. Where would the outliers be if a distribution had a skewness of 0?

Left

No outliers

Far right

Right

Far left

Answer

Correct Answer: No outliers

Note: This Question is unanswered, help us to find answer for this one

219. A mean calculation is a part of _______ statistics.

non-parametric

Neither of these

parametric

Answer

Correct Answer: parametric

Note: This Question is unanswered, help us to find answer for this one

220. Which of the following is quantitative data:

A schedule of meetings

Test scores for English class

A list of song titles

A prescription written by a physician

Answer

Correct Answer: Test scores for English class

Note: This Question is unanswered, help us to find answer for this one

221. The ______ describes the dispersion of a data set.

standard deviation

median

None of these

mean

Answer

Correct Answer: standard deviation

Note: This Question is unanswered, help us to find answer for this one

222. What is the value of the middle observation in a ordered set of numbers

Median

Mode

Central Standard

Mean

Answer

Correct Answer: Median

Note: This Question is unanswered, help us to find answer for this one

223. What is the mode of: 5, 10, 10, 15, 17?

11.2

Answer

Correct Answer: 10

Note: This Question is unanswered, help us to find answer for this one

224. What is the average of the following 5 numbers? 1, 2, 3, 4, 10

Answer

Correct Answer: 4

Note: This Question is unanswered, help us to find answer for this one

225. Discrete and continuous data are both forms of _______ data.

incomplete

qualitative

quantitative

None of these

Answer

Correct Answer: quantitative

Note: This Question is unanswered, help us to find answer for this one

226. You flip an unbiased coin 2 times - what is the probability of getting 2 heads?

50%

Cannot determine

100%

75%

25%

Answer

Correct Answer: 25%

Note: This Question is unanswered, help us to find answer for this one

227. The number of cars that went through a car wash during the noon hour over each of the past 8 days are the following: 5, 9, 2, 3, 3, 9, 8, 6 What is the range of this data?

5.6

Answer

Correct Answer: 7

Note: This Question is unanswered, help us to find answer for this one

228. If a data set follows a normal distribution, approximately ___% of data falls within 1 standard deviation of the mean.

68%

25%

100%

Answer

Correct Answer: 68%

Note: This Question is unanswered, help us to find answer for this one

229. What is true about these 5 numbers? -2, -1, 0, 5, 10

The mean is larger than the median.

The median is larger than the mean.

Cannot compare means and medians.

The median and mean are equal to each other.

Answer

Correct Answer: The mean is larger than the median.

Note: This Question is unanswered, help us to find answer for this one

230. What is the mean of a standard normal distribution?

0.5

100

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

231. What is the median of: 5, 10, 15?

9.5

Answer

Correct Answer: 10

Note: This Question is unanswered, help us to find answer for this one

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Basic Statistics & Probability MCQ

1. In one study, over half of women ages 18-25 would rather be _____ than be fat.

2. Which of the following statements are correct with regard to the images within a webpage?

3. This question is based upon the figure shown below Question: The formula given above is that of:

4. This question is based upon the figure shown below In the above image it is stated that:

5. Which important information does the correlation analysis of variables give about the relationship between the variables?

6. This question is based upon the figure shown below Describe the relationship between the two variables in the above given scatter plot.

7. The following are data collection methods except:

8. The events that are not affected by other outcomes are called:

10. The reasons for choosing a sample out of a population are:

11. In which of the following fields is ANOVA used to make comparisons amongst groups?

12. The middle point of a data set arranged in an array from the smallest to the largest value is called:

13. ______takes into account the distance of every point in the scatter plot from the trend line.

14. In which chart is the data organized in a descending order and includes a trend line as well?

15. Statistics help in making inferences and drawing conclusions. These conclusions in turn help in:

16. Once a sample is drawn from the population, how close the sample is to the larger population is to be determined. This is known as:

17. A ________ is a graphic representation of data based on paired observations.

18. Which of the following is not a research ethic?

19. In marketing research, which measure of central tendency is often used in a set of ordinal data?

20. The following are the test scores in history for ten students: 61,10,88,37,61,72,55,61,46,22. Calculate the mode of these test scores.

21. Find out the median of the following data set: 8126m; 8611m; 7817m; 8172m; 8076m; 8848m; 8598m

22. It is important to categorize your data and data can be categorized into the following categories:

23. The idea behind reviewing existing knowledge is:

24. Ordinal numbers or data are primarily concerned with:

26. In correlation analysis, we designate one variable as an independent variable and the other as a dependent variable.

27. How many types of major sampling methods are there?

28. In the Sampling Process, soon after identifying the sampling method comes the process of:

29. When the data values are tightly clustered around the mean, the bell shaped curve is:

30. How is a Type II error symbolized as?

31. Commonly employed qualitative research methods include:

32. Which of the following is not an example of hypothesis?

33. The process in which data about the variables is collected and then predictions are made about future outcome is called:

34. Which graphical tool is used to arrive at decisions by presenting and comparing a number of competing alternatives?

35. The advantage(s) of Scientific Research Method is/are:

36. What will be the potential sampling frame(s) for a survey whose target population is infant children?

37. A good research plan should include the following except:

38. While accepting or rejecting a null hypothesis , ________ are the regions that help to arrive at a decision.

39. Examples of Measures of central tendency include:

40. The correlation co-efficient quantifies the strength of the relationship between two variables and the value of this co-efficient falls between:

41. Cross tabulation of data is possible through the following:

42. Probability proves useful:

43. Cluster sampling and Stratified sampling form part of Probability Sampling Methods.

44. _________ is one of the basic methods of inferential statistics that helps a researcher determine the difference between a real and a random pattern in a data set.

45. Of the three Measures of central tendency, which one is the most sensitive to outliers?

46. Trying to learn more about a larger population from a small sample, is an example of:

47. Numerical data can be presented by way of which of the following:

48. Which data category uses numbers to indicate a classification?

49. In statistical analysis, central tendency points to the clustering of the data around a _____________.

50. Statistics can be divided into 2 broad sections. One is Descriptive Statistics, the other is:

51. The following statements regarding a Hypothesis are true except:

52. When you are figuring out How to collect, process and analyze data, you are:

53. Stem and leaf display is an example of:

54. The components of Simple Linear Regression model include the following except:

55. Standard deviation is the most common measure of __________.

56. The population you are interested in studying is called:

57. What is the probability of occurrence of a Type I error referred to as?

58. Statistics is a branch of ______

59. Probability can be determined by:

60. Which of these can be used as source(s) of data collection?

61. Which type of sampling method solicits the opinions of pre-selected experts?

62. The relationship between two variables is of two types. One is Linear, the other is:

63. A sample of a population is:

64. While following the Scientific Research steps, a researcher has to construct a hypothesis soon after defining the problem

65. Which of the following form(s) part of descriptive analysis?

66. When a person conducts analysis using data he or she has not collected, the source of such data is called:

67. There are two ways to present categorical data. One is by way of graphs, the other is by way of ____

68. The _____ is a useful tool for assessing whether the means of two groups of variable are statistically different from each other.

69. When a researcher doesn't know much about a certain problem and wants to gain more information about it, which research design will he use?

70. Arranging your target population in an ordered scheme from which participants or items are chosen at regular intervals is an example of:

71. A study finds that children who spend more hours in TV viewing score lower class grades in school. This correlation is an example of:

72. ______ is the most frequent value that is present in your data.

73. ______ is one way to understand the relationship between two variables that occur at the same time.

74. Population parameters include the following except:

75. Prior experience and situational analysis are important in making decisions when a person does not have enough information to calculate the probability of occurrence of an event.

76. The Causal Research design is used when the ______ factor about some phenomenon or issue is being researched.

77. Is it true that nCr = nC(n-r) ?

78. Suppose E and F are events in a sample space S. Suppose further that E has probability .5, F has probability .6, and the intersection of E and F has probability .2. Find the probability of the union of E and (the complement of F).

79. Suppose E and F are independent events in a sample space S. Suppose further that E has probability .3 and F has probability .4. What is the probability of the union of E and F?

80. What is the cumulative probability at -1 standard deviation for a normal distribution?

81. Which of the following is NOT essential for multiple regression modeling?

2.
Which of the following statements are correct with regard to the images within a webpage?

3.
This question is based upon the figure shown below

Question:

The formula given above is that of:

4.
This question is based upon the figure shown below

In the above image it is stated that:

5.

Which important information does the correlation analysis of variables give about the relationship between the variables?

6.
This question is based upon the figure shown below

Describe the relationship between the two variables in the above given scatter plot.

7.
The following are data collection methods except:

8.
The events that are not affected by other outcomes are called:

10.
The reasons for choosing a sample out of a population are:

11.
In which of the following fields is ANOVA used to make comparisons amongst groups?

12.
The middle point of a data set arranged in an array from the smallest to the largest value is called:

13.
______takes into account the distance of every point in the scatter plot from the trend line.

14.
In which chart is the data organized in a descending order and includes a trend line as well?

15.
Statistics help in making inferences and drawing conclusions. These conclusions in turn help in:

16.
Once a sample is drawn from the population, how close the sample is to the larger population is to be determined. This is known as:

17.
A ________ is a graphic representation of data based on paired observations.

18.
Which of the following is not a research ethic?

19.
In marketing research, which measure of central tendency is often used in a set of ordinal data?

20.
The following are the test scores in history for ten students:

61,10,88,37,61,72,55,61,46,22.

Calculate the mode of these test scores.

21.
Find out the median of the following data set:

8126m; 8611m; 7817m; 8172m; 8076m; 8848m; 8598m

22.
It is important to categorize your data and data can be categorized into the following categories:

23.
The idea behind reviewing existing knowledge is:

24.
Ordinal numbers or data are primarily concerned with:

26.
In correlation analysis, we designate one variable as an independent variable and the other as a dependent variable.

27.
How many types of major sampling methods are there?

28.
In the Sampling Process, soon after identifying the sampling method comes the process of:

29.
When the data values are tightly clustered around the mean, the bell shaped curve is:

30.
How is a Type II error symbolized as?

31.
Commonly employed qualitative research methods include:

32.
Which of the following is not an example of hypothesis?

33.
The process in which data about the variables is collected and then predictions are made about future outcome is called:

34.
Which graphical tool is used to arrive at decisions by presenting and comparing a number of competing alternatives?

35.
The advantage(s) of Scientific Research Method is/are:

36.
What will be the potential sampling frame(s) for a survey whose target population is infant children?

37.
A good research plan should include the following except:

38.
While accepting or rejecting a null hypothesis , ________ are the regions that help to arrive at a decision.

39.
Examples of Measures of central tendency include:

40.
The correlation co-efficient quantifies the strength of the relationship between two variables and the value of this co-efficient falls between:

41.
Cross tabulation of data is possible through the following:

42.
Probability proves useful:

43.
Cluster sampling and Stratified sampling form part of Probability Sampling Methods.

44.
_________ is one of the basic methods of inferential statistics that helps a researcher determine the difference between a real and a random pattern in a data set.

45.
Of the three Measures of central tendency, which one is the most sensitive to outliers?

46.
Trying to learn more about a larger population from a small sample, is an example of:

47.
Numerical data can be presented by way of which of the following:

48.
Which data category uses numbers to indicate a classification?

49.
In statistical analysis, central tendency points to the clustering of the data around a _____________.

50.
Statistics can be divided into 2 broad sections. One is Descriptive Statistics, the other is:

51.
The following statements regarding a Hypothesis are true except:

52.
When you are figuring out How to collect, process and analyze data, you are:

53.
Stem and leaf display is an example of:

54.
The components of Simple Linear Regression model include the following except:

55.
Standard deviation is the most common measure of __________.

56.
The population you are interested in studying is called:

57.
What is the probability of occurrence of a Type I error referred to as?

58.
Statistics is a branch of ______

59.
Probability can be determined by:

60.
Which of these can be used as source(s) of data collection?

61.
Which type of sampling method solicits the opinions of pre-selected experts?

62.
The relationship between two variables is of two types. One is Linear, the other is:

63.
A sample of a population is:

64.
While following the Scientific Research steps, a researcher has to construct a hypothesis soon after defining the problem

65.
Which of the following form(s) part of descriptive analysis?

66.
When a person conducts analysis using data he or she has not collected, the source of such data is called:

67.
There are two ways to present categorical data. One is by way of graphs, the other is by way of ____

68.
The _____ is a useful tool for assessing whether the means of two groups of variable are statistically different from each other.

69.
When a researcher doesn't know much about a certain problem and wants to gain more information about it, which research design will he use?

70.
Arranging your target population in an ordered scheme from which participants or items are chosen at regular intervals is an example of:

71.
A study finds that children who spend more hours in TV viewing score lower class grades in school. This correlation is an example of:

72.
______ is the most frequent value that is present in your data.

73.
______ is one way to understand the relationship between two variables that occur at the same time.

74.
Population parameters include the following except:

75.
Prior experience and situational analysis are important in making decisions when a person does not have enough information to calculate the probability of occurrence of an event.

76.
The Causal Research design is used when the ______ factor about some phenomenon or issue is being researched.