Statistics Quiz # 21

As the degrees of freedom increase, the t distribution approaches the _____ distribution.

P = .50

Decreases

Confidence level

Normal

A probability distribution for all possible values of a sample statistic is known as a _____.

A sample statistic

A parameter

Simple random sampling

A sampling distribution

None of the above

A ____________ variable can have values that are numbers on the real number line.

Qualitative

Quantitative

Random

Nominative

A contingency table would be used to summarize data such as ________.

Company employees by gender and organizational title

Company employees by gender and age

Company employees by compensation and age

Company employees by compensation and years with the company

Both qualitative and quantitative data can be displayed using a _____ graph.

Circle

Line

Bar

Pie

The ___ can be used to show the rank order and shape of a data set simultaneously.

Ogive

Pie chart

Stem-and-leaf display

Bar chart

In a scatterplot, a(n) ______________ is a point lying far away from the other data points.

Outliner

Y-intercept

Slope

Influential point

Sample size and the confidence level width have a (n) __________ relationship.

Symbiotic

Inverse

Synonymous

Identical

Based on the regression equation, we can _______________.

Predict the value of the dependent variable given a value of the independent variable

Predict the value of the independent variable given a value of the dependent variable

Predict the value slope of the line

Measure the association between two variables

If calculated required sample size is a non integer value, we should always _____ calculated value.

Round up

Eliminate 1

Divide by 0

None of these

Data displays are __________ patterns in data.

Coded examples of

Numerical references to

Visual images of

Dull-down menus that access

By selecting a larger alpha level, a researcher is ______.

Attempting to make it easier to reject H0

Better able to detect a treatment effect

Increasing the risk of a Type I error

All of the above

The area under the normal curve to the right of μ equals _______.

1

1/2

The complement of an event a, within the sample space s, is the event consisting of ____________.

All outcomes in S that are not in A

All outcomes in A that are not in S

Some outcomes in S that are not in A

Some outcomes in A that are not in S

The first and second steps in constructing a frequency distribution are __________.

Calculate the range of the data set ; Divide the range by the number of groups you want and then round up

Alternative hypothesis; Calculate the range of the data set

Null hypothesis; Alternative hypothesis

Direct hypothesis; Null hypothesis

The five number summary can be calculated ___________.

For a quantitative variable, but not for a categorical variable

Calculate the range of the data set ; Divide the range by the number of groups you want and then round up

Alternative hypothesis; Calculate the range of the data set

Null hypothesis; Alternative hypothesis

The heights of the bars of a histogram correspond to _______ values.

Frequency

Alternative hypothesis

Null hypothesis

Direct hypothesis

The hypothesis statement h: μ < 60 is an example of a(an) ________ hypothesis.

Alternative hypothesis

Null hypothesis

Direct hypothesis

All of these

The maximum height of a normal curve corresponds to the ________ of a normal distribution.

Range

Mean

Standard deviation

Statistical significance

The mean of a collection of data is located at the ______ of a distribution of data.

Balancing point

Standard deviation

Statistical significance

The sum of the differences between sample observations and the sample mean is equal to _______.

Zero

The mean deviation

The range

The standard deviation

To locate the percentile for a given observation in a data set, the data must be ___________.

Displayed in a histogram

Sorted and listed from the minimum to the maximum values

Distributed symmetrically around the mean

Summarized in a frequency distribution

Two samples are ________________ if the sample values are paired.

Dependant

Independant

Both

In a curvilinear regression model, the ________ represents the curvilinear effect.

Intercept

Error term

Slope

R Square

A(n) _______ distribution has a ""bell"" shape.

Normal.

Outlier.

Relative frequency.

Polygon.

Just because there is a correlation between a and b __________.

Is the same as the correlation between B and A.

At least one output and one input, but the output obviously is insufficient to generate the input shown

At least one input and one output, but the input obviously is insufficient to generate the output shown

When making pareto charts, data should be arranged ________________________ according to frequency.

From smallest to largest

With increasing time

From largest to smallest

Clockwise

Selections made with replacement are considered to be _______.

Independent

Sample space

Equally likely.

Tree diagram.

This is an arrangement of data, usually in rows and columns. it is called a ___.

Trend

Dependant

Table

Correlation

In a probability histogram, there is a correspondence between _______.

Random Variable

Area and probability

Expected value

Number of success