Question 1

Which of the following is the strongest correlation?

Accepted Answer

A) 0.21 
B) 0.87 
C) 0.44 
D) -0.92 
A) 0.21 
B) 0.87 
C) 0.44 
D) -0.92

Question 2

If X increases in value as Y increases,what type of correlation exists?

Accepted Answer

A) positive correlation 
B) negative correlation 
C) no correlation 
D) inverse correlation 
A) positive correlation 
B) negative correlation 
C) no correlation 
D) inverse correlation

Question 3

The ______ is used to summarize the correlations between a set of variables:

Accepted Answer

A) scatterplot 
B) correlation 
C) correlation matrix 
D) scatterplot matrix 
A) scatterplot 
B) correlation 
C) correlation matrix 
D) scatterplot matrix

Question 4

If X decreases in value as Y increases in value,what type of correlation exists?

Accepted Answer

A) positive correlation 
B) direct correlation 
C) negative correlation 
D) no correlation 
A) positive correlation 
B) direct correlation 
C) negative correlation 
D) no correlation

Question 5

When data points group together in a cluster from the upper left-hand side of the xy axis to the lower right-hand side,what is this?

Accepted Answer

A) negative slope 
B) positive slope 
C) positive intercept 
D) negative intercept 
A) negative slope 
B) positive slope 
C) positive intercept 
D) negative intercept

Question 6

Correlation coefficients are used to describe ______.

Accepted Answer

A) a group 
B) individuals 
C) individuals as well as the group 
D) this depends on the correlation coefficient used 
A) a group 
B) individuals 
C) individuals as well as the group 
D) this depends on the correlation coefficient used

Question 7

If you wanted to compute the correlation between two interval-level variables,which type of correlation should you use?

Accepted Answer

A) point biserial 
B) phi 
C) Spearman rank 
D) Pearson 
A) point biserial 
B) phi 
C) Spearman rank 
D) Pearson

Question 8

A correlation coefficient comparing exercise and body mass is -.67.What does this say about the relationship between exercise and weight?

Accepted Answer

If exercise / body mass = -.67

Question 9

If the correlation between variables is 0.80,what is the coefficient of determination?

Accepted Answer

A) 0.20 
B) 0.34 
C) 0.64 
D) 0.80 
A) 0.20 
B) 0.34 
C) 0.64 
D) 0.80

Question 10

A negative correlation indicates that variables change in opposite directions.

Accepted Answer

A) True 
 B)False

Question 11

In certain cases,Pearson's product-moment correlation coefficient can have values greater than 1.

Accepted Answer

A) True 
 B)False

Question 12

This is another word for a negative correlation.

Accepted Answer

A) direct correlation 
B) weak correlation 
C) indirect correlation 
D) strong correlation 
A) direct correlation 
B) weak correlation 
C) indirect correlation 
D) strong correlation

Question 13

When data points group together in a cluster from the lower left-hand side of the xy axis to the upper right-hand side,what is this?

Accepted Answer

A) negative slope 
B) positive slope 
C) negative intercept 
D) positive intercept 
A) negative slope 
B) positive slope 
C) negative intercept 
D) positive intercept

Question 14

Correlation coefficients describe every individual person in your data set.

Accepted Answer

A) True 
 B)False

Question 15

A positive correlation between two variables would be represented in a scatterplot as ______.

Accepted Answer

A) a line sloping upward 
B) a line sloping downward 
C) a horizontal line 
D) a vertical line 
A) a line sloping upward 
B) a line sloping downward 
C) a horizontal line 
D) a vertical line

Question 16

The correlation between variable X and variable Y is represented by which of the following?

Accepted Answer

A) R(xy)2 
B) rxy 
C) rx(y) 
D) Rx / y 
A) R(xy)2 
B) rxy 
C) rx(y) 
D) Rx / y

Question 17

If the coefficient of determination between two variables is 0.81,what is the coefficient of alienation?

Accepted Answer

A) 0.19 
B) 0.34 
C) 0.66 
D) 0.90 
A) 0.19 
B) 0.34 
C) 0.66 
D) 0.90

Question 18

Which of the following is the weakest correlation?

Accepted Answer

A) -0.24 
B) -0.22 
C) 0.19 
D) -0.96 
A) -0.24 
B) -0.22 
C) 0.19 
D) -0.96

Question 19

"The better your time management skills are,the more work you are able to do" is an example of a ______.

Accepted Answer

A) continuous correlation 
B) biserial correlation 
C) positive correlation 
D) negative correlation 
A) continuous correlation 
B) biserial correlation 
C) positive correlation 
D) negative correlation

Question 20

The coefficient of determination is more precise than using a correlation coefficient alone.

Accepted Answer

A) True 
 B)False

Which of the following is the strongest correlation?

If X increases in value as Y increases,what type of correlation exists?

The ______ is used to summarize the correlations between a set of variables:

If X decreases in value as Y increases in value,what type of correlation exists?

When data points group together in a cluster from the upper left-hand side of the xy axis to the lower right-hand side,what is this?

Correlation coefficients are used to describe ______.

If you wanted to compute the correlation between two interval-level variables,which type of correlation should you use?

A correlation coefficient comparing exercise and body mass is -.67.What does this say about the relationship between exercise and weight?

If the correlation between variables is 0.80,what is the coefficient of determination?

A negative correlation indicates that variables change in opposite directions.

In certain cases,Pearson's product-moment correlation coefficient can have values greater than 1.

This is another word for a negative correlation.

When data points group together in a cluster from the lower left-hand side of the xy axis to the upper right-hand side,what is this?

Correlation coefficients describe every individual person in your data set.

A positive correlation between two variables would be represented in a scatterplot as ______.

The correlation between variable X and variable Y is represented by which of the following?

If the coefficient of determination between two variables is 0.81,what is the coefficient of alienation?

Which of the following is the weakest correlation?

"The better your time management skills are,the more work you are able to do" is an example of a ______.

The coefficient of determination is more precise than using a correlation coefficient alone.

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

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Exam 5: Computing Correlation Coefficients: Ice Cream and Crime

Which of the following is the strongest correlation?

If X increases in value as Y increases,what type of correlation exists?

The ______ is used to summarize the correlations between a set of variables:

If X decreases in value as Y increases in value,what type of correlation exists?

When data points group together in a cluster from the upper left-hand side of the xy axis to the lower right-hand side,what is this?

Correlation coefficients are used to describe ______.

If you wanted to compute the correlation between two interval-level variables,which type of correlation should you use?

A correlation coefficient comparing exercise and body mass is -.67.What does this say about the relationship between exercise and weight?

If the correlation between variables is 0.80,what is the coefficient of determination?

A negative correlation indicates that variables change in opposite directions.

In certain cases,Pearson's product-moment correlation coefficient can have values greater than 1.

This is another word for a negative correlation.

When data points group together in a cluster from the lower left-hand side of the xy axis to the upper right-hand side,what is this?

Correlation coefficients describe every individual person in your data set.

A positive correlation between two variables would be represented in a scatterplot as ______.

The correlation between variable X and variable Y is represented by which of the following?

If the coefficient of determination between two variables is 0.81,what is the coefficient of alienation?

Which of the following is the weakest correlation?

"The better your time management skills are,the more work you are able to do" is an example of a ______.

The coefficient of determination is more precise than using a correlation coefficient alone.

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters