Question 1

Which of the following indicates a significant correlation?

Accepted Answer

A) p = 0.21 
B) p < 0.05 
C) p < 0.20 
D) p < 0.50 
A) p = 0.21 
B) p < 0.05 
C) p < 0.20 
D) p < 0.50

Question 2

In the formula for calculating degrees of freedom for a correlation coefficient,what does the n represent?

Accepted Answer

A) sample size 
B) number of groups 
C) number of pairs 
D) population 
A) sample size 
B) number of groups 
C) number of pairs 
D) population

Question 3

The appropriate method for calculating the degrees of freedom associated with a correlation coefficient is ______

Accepted Answer

A) n - 1 
B) n - 2 
C) n - 3 
D) n - 4 
A) n - 1 
B) n - 2 
C) n - 3 
D) n - 4

Question 4

When you posit that a relationship between two variables will be either positive or negative,which of the following will you use?

Accepted Answer

A) one-tailed test 
B) ANOVA test 
C) two-tailed test 
D) Cohen's d test 
A) one-tailed test 
B) ANOVA test 
C) two-tailed test 
D) Cohen's d test

Question 5

The level of significance or Type I error typically set for testing the level of significance of a correlation coefficient is ______.

Accepted Answer

A) 0.01 
B) 0.05 
C) 0.95 
D) 0.99 
A) 0.01 
B) 0.05 
C) 0.95 
D) 0.99

Question 6

When computing a correlation coefficient,if you have 27 degrees of freedom,your sample size must be ______.

Accepted Answer

A) 25 
B) 27 
C) 29 
D) 26 
A) 25 
B) 27 
C) 29 
D) 26

Question 7

When computing the correlation coefficient,the ______ between variables,not the ______ between groups is being examined.

Accepted Answer

A) relationship;difference 
B) difference;relationship 
C) means,reliability 
D) reliability;means 
A) relationship;difference 
B) difference;relationship 
C) means,reliability 
D) reliability;means

Question 8

The correlation between the two variables of interest is 0.81,which is significant at the 0.0337 level.That means ______.

Accepted Answer

A) that the null hypothesis is rejected 
B) that the research hypothesis is rejected 
C) that the null hypothesis is accepted 
D) that the null hypothesis cannot be determined 
A) that the null hypothesis is rejected 
B) that the research hypothesis is rejected 
C) that the null hypothesis is accepted 
D) that the null hypothesis cannot be determined

Question 9

If the correlation between two variables is 0.496,how much of the variance has not been accounted for?

Accepted Answer

A) 24.6% 
B) 49.6% 
C) 50.4% 
D) 75.4% 
A) 24.6% 
B) 49.6% 
C) 50.4% 
D) 75.4%

Question 10

The correlation coefficient measures ______.

Accepted Answer

A) mean differences 
B) causation 
C) prediction 
D) association 
A) mean differences 
B) causation 
C) prediction 
D) association

Question 11

What is the most important characteristic of a correlation coefficient?

Accepted Answer

A) number of variables included 
B) absolute value 
C) one-tailed 
D) two-tailed 
A) number of variables included 
B) absolute value 
C) one-tailed 
D) two-tailed

Question 12

Statistically significant correlations cannot show ______.

Accepted Answer

A) the probability level 
B) the size of the effect 
C) causality 
D) the strength of the effect 
A) the probability level 
B) the size of the effect 
C) causality 
D) the strength of the effect

Question 13

Give an example of a situation when it would be appropriate to use the t test for the correlation coefficient test statistic.

Accepted Answer

A study comparing the relation

Question 14

This chapter illustrates that you can also incorporate ______ into the correlation coefficient.

Accepted Answer

A) statistical significance 
B) substantial significance 
C) descriptive statistics 
D) generalizability 
A) statistical significance 
B) substantial significance 
C) descriptive statistics 
D) generalizability

Question 15

Correlation coefficients can test ______ variable(s)at a time.

Accepted Answer

A) only one 
B) only two 
C) one or more 
D) two or more 
A) only one 
B) only two 
C) one or more 
D) two or more

Question 16

With correlations,tests can be either directional or nondirectional.

Accepted Answer

A) True 
 B)False

Question 17

Write an example of a research hypothesis for a two-tailed t test for the correlation coefficient.

Accepted Answer

An example of a research hypot

Question 18

If the hypothesis shows no direction,what type of correlation coefficient should be used?

Accepted Answer

A) partial correlation 
B) absolute value 
C) one-tailed 
D) two-tailed 
A) partial correlation 
B) absolute value 
C) one-tailed 
D) two-tailed

Which of the following indicates a significant correlation?

In the formula for calculating degrees of freedom for a correlation coefficient,what does the n represent?

The appropriate method for calculating the degrees of freedom associated with a correlation coefficient is ______

When you posit that a relationship between two variables will be either positive or negative,which of the following will you use?

The level of significance or Type I error typically set for testing the level of significance of a correlation coefficient is ______.

When computing a correlation coefficient,if you have 27 degrees of freedom,your sample size must be ______.

When computing the correlation coefficient,the between variables,not the between groups is being examined.

The correlation between the two variables of interest is 0.81,which is significant at the 0.0337 level.That means ______.

If the correlation between two variables is 0.496,how much of the variance has not been accounted for?

The correlation coefficient measures ______.

What is the most important characteristic of a correlation coefficient?

Statistically significant correlations cannot show ______.

Give an example of a situation when it would be appropriate to use the t test for the correlation coefficient test statistic.

This chapter illustrates that you can also incorporate ______ into the correlation coefficient.

Correlation coefficients can test ______ variable(s)at a time.

With correlations,tests can be either directional or nondirectional.

Write an example of a research hypothesis for a two-tailed t test for the correlation coefficient.

If the hypothesis shows no direction,what type of correlation coefficient should be used?

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

Computing Correlation Coefficients: Ice Cream and Crime

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

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

Exam 15: Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Which of the following indicates a significant correlation?

In the formula for calculating degrees of freedom for a correlation coefficient,what does the n represent?

The appropriate method for calculating the degrees of freedom associated with a correlation coefficient is ______

When you posit that a relationship between two variables will be either positive or negative,which of the following will you use?

The level of significance or Type I error typically set for testing the level of significance of a correlation coefficient is ______.

When computing a correlation coefficient,if you have 27 degrees of freedom,your sample size must be ______.

When computing the correlation coefficient,the ______ between variables,not the ______ between groups is being examined.

The correlation between the two variables of interest is 0.81,which is significant at the 0.0337 level.That means ______.

If the correlation between two variables is 0.496,how much of the variance has not been accounted for?

The correlation coefficient measures ______.

What is the most important characteristic of a correlation coefficient?

Statistically significant correlations cannot show ______.

Give an example of a situation when it would be appropriate to use the t test for the correlation coefficient test statistic.

This chapter illustrates that you can also incorporate ______ into the correlation coefficient.

Correlation coefficients can test ______ variable(s)at a time.

With correlations,tests can be either directional or nondirectional.

Write an example of a research hypothesis for a two-tailed t test for the correlation coefficient.

If the hypothesis shows no direction,what type of correlation coefficient should be used?

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

Computing Correlation Coefficients: Ice Cream and Crime

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

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

When computing the correlation coefficient,the between variables,not the between groups is being examined.