Question 1

In the equation r(65) = 0.45,p < 0.05,what does r represent?

Accepted Answer

A) observed statistic 
B) test statistic 
C) experimental statistic 
D) critical statistic 
A) observed statistic 
B) test statistic 
C) experimental statistic 
D) critical statistic B

Question 2

The correlation between the two variables of interest is 0.081,which is significant at the 0.637 level.This means ______.

Accepted Answer

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

Question 3

Correlations can be used to examine the differences between groups.

Accepted Answer

A) True 
 B)False  False

Question 4

The research hypothesis posits that there will be a relationship between the number of hours a student studies and their result on a test (H1: rxy ≠ 0).What would be concluded for r(45)= 0.213,p > 0.05?

Accepted Answer

The obtained value (0.213)is less than t

Question 5

What is another term for a negative correlation?

Accepted Answer

A) indirect 
B) nondirectional 
C) direct 
D) unidirectional 
A) indirect 
B) nondirectional 
C) direct 
D) unidirectional

Question 6

Which of the following indicates a nonsignificant correlation?

Accepted Answer

A) p < 0.05 
B) p < 0.01 
C) p = 0.02 
D) p = 0.30 
A) p < 0.05 
B) p < 0.01 
C) p = 0.02 
D) p = 0.30

Question 7

If a simple Pearson correlation value = 0.512,what percentage of variance is accounted for?

Accepted Answer

A) 26% 
B) 49% 
C) 51% 
D) 74% 
A) 26% 
B) 49% 
C) 51% 
D) 74%

Question 8

If the coefficient of determination is 0.767,what is correlation between the two variables?

Accepted Answer

A) 0.246 
B) 0.496 
C) 0.504 
D) 0.876 
A) 0.246 
B) 0.496 
C) 0.504 
D) 0.876

Question 9

Write an example of a null hypothesis for a t test for the correlation coefficient.

Accepted Answer

An example of a null hypothesi

Question 10

What is another term for a positive correlation?

Accepted Answer

A) indirect correlation 
B) nondirectional correlation 
C) direct correlation 
D) unidirectional correlation 
A) indirect correlation 
B) nondirectional correlation 
C) direct correlation 
D) unidirectional correlation

Question 11

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

Accepted Answer

An example of a research hypothesis for

Question 12

Another term for a direct correlation is ______

Accepted Answer

A) a positive correlation 
B) a nondirectional correlation 
C) a negative correlation 
D) a unidirectional correlation 
A) a positive correlation 
B) a nondirectional correlation 
C) a negative correlation 
D) a unidirectional correlation

Question 13

When you hypothesize that there will be a relationship between couples' listening skills and length of marriage,you have a ______.

Accepted Answer

A) one-tailed hypothesis 
B) invalid hypothesis 
C) valid hypothesis 
D) two-tailed hypothesis 
A) one-tailed hypothesis 
B) invalid hypothesis 
C) valid hypothesis 
D) two-tailed hypothesis

Question 14

If the correlation between two variables is 0.767,how much variance has not been accounted for?

Accepted Answer

A) 0.246 
B) 0.412 
C) 0.588 
D) 0.876 
A) 0.246 
B) 0.412 
C) 0.588 
D) 0.876

Question 15

In the equation r(65) = 0.45,p < 0.05,what is the obtained value?

Accepted Answer

A) 0.45 
B) 45 
C) 0.65 
D) 65 
A) 0.45 
B) 45 
C) 0.65 
D) 65

Question 16

Give an example of a one-tailed hypothesis that may be tested through a correlation.

Accepted Answer

Example: Higher crim

Question 17

The correlation coefficient can only be used for one-tailed tests.

Accepted Answer

A) True 
 B)False

Question 18

A significant correlation does not indicate causality.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is an example of a null hypothesis for testing a correlation coefficient?

Accepted Answer

A) H1: $\rho$xy = 0 
B) H1: $\rho$xy > 0 
C) H0: $\rho$xy = 0 
D) H0: $\rho$xy > 0 
A) H1: $\rho$xy = 0 
B) H1: $\rho$xy > 0 
C) H0: $\rho$xy = 0 
D) H0: $\rho$xy > 0

Question 20

When computing a correlation coefficient,if you have 55 degrees of freedom,your sample size must be ______.

Accepted Answer

A) 55 
B) 53 
C) 56 
D) 57 
A) 55 
B) 53 
C) 56 
D) 57

In the equation r₍₆₅₎ = 0.45,p < 0.05,what does r represent?

The correlation between the two variables of interest is 0.081,which is significant at the 0.637 level.This means ______.

Correlations can be used to examine the differences between groups.

The research hypothesis posits that there will be a relationship between the number of hours a student studies and their result on a test (H₁: r_xy ≠ 0).What would be concluded for r₍₄₅₎= 0.213,p > 0.05?

What is another term for a negative correlation?

Which of the following indicates a nonsignificant correlation?

If a simple Pearson correlation value = 0.512,what percentage of variance is accounted for?

If the coefficient of determination is 0.767,what is correlation between the two variables?

Write an example of a null hypothesis for a t test for the correlation coefficient.

What is another term for a positive correlation?

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

Another term for a direct correlation is ______

When you hypothesize that there will be a relationship between couples' listening skills and length of marriage,you have a ______.

If the correlation between two variables is 0.767,how much variance has not been accounted for?

In the equation r₍₆₅₎ = 0.45,p < 0.05,what is the obtained value?

Give an example of a one-tailed hypothesis that may be tested through a correlation.

The correlation coefficient can only be used for one-tailed tests.

A significant correlation does not indicate causality.

Which of the following is an example of a null hypothesis for testing a correlation coefficient?

When computing a correlation coefficient,if you have 55 degrees of freedom,your sample size must be ______.

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

In the equation r(65) = 0.45,p < 0.05,what does r represent?

The correlation between the two variables of interest is 0.081,which is significant at the 0.637 level.This means ______.

Correlations can be used to examine the differences between groups.

The research hypothesis posits that there will be a relationship between the number of hours a student studies and their result on a test (H1: rxy ≠ 0).What would be concluded for r(45)= 0.213,p > 0.05?

What is another term for a negative correlation?

Which of the following indicates a nonsignificant correlation?

If a simple Pearson correlation value = 0.512,what percentage of variance is accounted for?

If the coefficient of determination is 0.767,what is correlation between the two variables?

Write an example of a null hypothesis for a t test for the correlation coefficient.

What is another term for a positive correlation?

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

Another term for a direct correlation is ______

When you hypothesize that there will be a relationship between couples' listening skills and length of marriage,you have a ______.

If the correlation between two variables is 0.767,how much variance has not been accounted for?

In the equation r(65) = 0.45,p < 0.05,what is the obtained value?

Give an example of a one-tailed hypothesis that may be tested through a correlation.

The correlation coefficient can only be used for one-tailed tests.

A significant correlation does not indicate causality.

Which of the following is an example of a null hypothesis for testing a correlation coefficient?

When computing a correlation coefficient,if you have 55 degrees of freedom,your sample size must be ______.

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

In the equation r₍₆₅₎ = 0.45,p < 0.05,what does r represent?

The research hypothesis posits that there will be a relationship between the number of hours a student studies and their result on a test (H₁: r_xy ≠ 0).What would be concluded for r₍₄₅₎= 0.213,p > 0.05?

In the equation r₍₆₅₎ = 0.45,p < 0.05,what is the obtained value?