Statistics Quiz # 10

A represents organizing data using a table, and a represents organizing data using a figure.

Histogram; bar graph

Frequency polygon; bar graph

Frequency distribution; histogram

Frequency polygon; frequency distribution

Another word for “lopsidedness” of a distribution is:

Kurtosis

Skewness

Platykurtic

Leptokurtic

Which of the following can be used to measure the shape of a distribution?

Mean

Mode

Kurtosis

Median

What do you need to calculate first before calculating skewness?

Mean and median

Median and mode

Mode and mean

Mode and variance

A table in which all of the scores are listed along with the frequency with which each occurs is a ______.

Bar graph

Histogram

Frequency polygon

Frequency distribution

A graphical representation of a frequency distribution in which vertical bars are centered above each category along the x-axis and separated from each other by a space is called a ______.

Histogram

Bar graph

Pie graph

Frequency polygon

A good rule of thumb when creating an illustration is:

Make sure your graph communicates only one idea.

Do not label items.

Use a lot of text.

Do not worry about centering titles and axis labels.

If I collected data on the number of children per family in a particular neighborhood, what type of graph should I use to organize the data?

Histogram

Bar graph

Frequency polygon

Frequency distribution

If I collected data on the frequency of various ethnicities represented at a university, what type of graph should I use to organize the data?

Histogram

Bar graph

Frequency polygon

Frequency distribution

A graphical representation of a frequency distribution in which vertical bars centered above scores on the x-axis that touch each other is called a ______.

Histogram

Bar graph

Pie graph

Frequency polygon

In general, a negative correlation means that as the values of one variable , there is a tendency for the values of the other variable to .

Increase; increase

Increase; remain the same

Increase; decrease

Decrease; decrease

Using a correlational design, a researcher found a relationship between the healthiness of one’s heart and the amount of fish oil in one’s diet. The researcher should conclude that ______.

A healthier heart causes one to consume more fish oil

The amount of fish oil in one’s diet causes a healthier heart

Although a relationship exists, one cannot infer that changes in one variable are causing changes in the other variable

The availability of fish causes changes in both the healthiness of one’s heart and the amount of fish oil consumed

What does a correlation coefficient do?

It allows us to draw conclusions about whether one variable causes another variable.

It creates a correlational design, rather than an experimental design.

It quantifies the pattern in a relationship.

It summarizes the X scores and the Y scores separately.

In an experimental design , whereas in a correlational design .

There is only one variable (the independent variable); there are two variables (X and Y)

There are two X variables; there are an X and a Y variable

Researchers assign each person an X score and then measure the score on the Y variable; researchers measure scores on variables that a participant has already experienced

Researchers measure scores on variables that a participant has already experienced; researchers assign each person an X score and then measure the score on the Y variable

A variable comes between two variables of interest and explains the apparent relationship and a variable affects both our variables of interest and explains the correlation between them.

Mediating; confounding

Moderating; confounding

Mediating; confusing

Confounding; mediating

If we calculate a correlation coefficient and we find that there is a relationship between the two variables, we ______.

Know that the data must be interval or ratio

Know, without referring to the study, that a correlational design was used

Can conclude that changes in one variable cause changes in the other variable

Cannot conclude that changes in one variable cause changes in the other variable

In general, a positive correlation means that as the values of one variable , there is a tendency for the values of the other variable to .

Increase; increase

Increase; remain the same

Increase; decrease

Decrease; increase

When looking at how one variable changes another variable, which of the following descriptive statistics would you want to use?

Mean

Variance

Correlation

Standard deviation

When plotting correlational data, the appropriate graph to use is the ______.

Line graph

Histogram

Bar graph

Scatterplot

Correlation coefficients are used to describe what?

A group

Individuals

Individuals as well as the group

It depends on the correlation coefficient used.

The best-fitting line through a scatterplot is known as the ______.

Scatterplot line

Variance line

Correlation line

Regression line

In a correlational analysis, N stands for the ______.

Total number of pairs of scores

Total number of X scores plus the total number of Y scores

Total number of X scores times the total number of Y scores

Total number of pairs of scores minus 2

Which of the following refers to a correlation between two variables?

Bi-correlate

Bivariate

Two-way variance

Two-way analysis

To know whether there is a relationship between two variables, you draw a line around the outer edges of a scatterplot. If there is a negative relationship, ______.

The scatterplot is simultaneously elliptical and circular

The scatterplot is elliptical and is slanted upward (left to right)

The scatterplot is elliptical and is slanted downward (left to right)

The scatterplot is either circular or elliptical, and the ellipse is parallel to the X axis

We should do a scatterplot of the data when we compute a correlation because the scatterplot allows us to ______.

See the relationship between the two variables

Determine the exact value of the correlation coefficient

Determine whether a relationship is likely to exist in the population from which the sample is taken

Predict accurate Y scores for known X scores

How often are the observed score and the TRUE scores the same?

Rarely

Sometimes

Often

Never

Rater-to-rater consistency is a(n) ______ reliability.

Interrater

Internal

Multiple-form

Concurrent

A test cannot be if it is not .

Valid; reliable

Reliable; valid

Normal; valid

Valid; skewed

Reliability means that the measure is in measuring the construct, whereas validity means that the measure is in measuring the construct.

Consistent; accurate

Variable, accurate

Accurate; consistent

Valid; reliable

The two types of criterion validity are:

Concurrent and predictive

Present and future

Current and future

Past and future

Quiz:	Statistics Quiz # 10
Subject:	Creating Graphs In Statistics
Total Questions:	636 MCQs
Time:	636 Minutes

Statistics Quiz # 10

A ______ represents organizing data using a table, and a ______ represents organizing data using a figure.

Another word for “lopsidedness” of a distribution is:

Which of the following can be used to measure the shape of a distribution?

What do you need to calculate first before calculating skewness?

A table in which all of the scores are listed along with the frequency with which each occurs is a ______.

A graphical representation of a frequency distribution in which vertical bars are centered above each category along the x-axis and separated from each other by a space is called a ______.

A good rule of thumb when creating an illustration is:

If I collected data on the number of children per family in a particular neighborhood, what type of graph should I use to organize the data?

If I collected data on the frequency of various ethnicities represented at a university, what type of graph should I use to organize the data?

A graphical representation of a frequency distribution in which vertical bars centered above scores on the x-axis that touch each other is called a ______.

In general, a negative correlation means that as the values of one variable ______, there is a tendency for the values of the other variable to ______.

Using a correlational design, a researcher found a relationship between the healthiness of one’s heart and the amount of fish oil in one’s diet. The researcher should conclude that ______.

What does a correlation coefficient do?

In an experimental design ______, whereas in a correlational design ______.

A ______ variable comes between two variables of interest and explains the apparent relationship and a ______ variable affects both our variables of interest and explains the correlation between them.

If we calculate a correlation coefficient and we find that there is a relationship between the two variables, we ______.

In general, a positive correlation means that as the values of one variable ______, there is a tendency for the values of the other variable to ______.

When looking at how one variable changes another variable, which of the following descriptive statistics would you want to use?

When plotting correlational data, the appropriate graph to use is the ______.

Correlation coefficients are used to describe what?

The best-fitting line through a scatterplot is known as the ______.

In a correlational analysis, N stands for the ______.

Which of the following refers to a correlation between two variables?

To know whether there is a relationship between two variables, you draw a line around the outer edges of a scatterplot. If there is a negative relationship, ______.

We should do a scatterplot of the data when we compute a correlation because the scatterplot allows us to ______.

How often are the observed score and the TRUE scores the same?

Rater-to-rater consistency is a(n) ______ reliability.

A test cannot be ______ if it is not ______.

Reliability means that the measure is ______ in measuring the construct, whereas validity means that the measure is ______ in measuring the construct.

The two types of criterion validity are:

A represents organizing data using a table, and a represents organizing data using a figure.

In general, a negative correlation means that as the values of one variable , there is a tendency for the values of the other variable to .

In an experimental design , whereas in a correlational design .

A variable comes between two variables of interest and explains the apparent relationship and a variable affects both our variables of interest and explains the correlation between them.

In general, a positive correlation means that as the values of one variable , there is a tendency for the values of the other variable to .

A test cannot be if it is not .

Reliability means that the measure is in measuring the construct, whereas validity means that the measure is in measuring the construct.