Question 1

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

Question 2

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

Question 3

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 C

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

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

Accepted Answer

An example of a null hypothesi...

Question 6

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 7

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 B

Question 8

What is another term for a positive correlation?

Accepted Answer

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

Question 9

Correlations can be used to examine the differences between groups.

Accepted Answer

A) True 
 B)False  False

Question 10

What is another term for a negative correlation?

Accepted Answer

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

Question 11

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%

Question 12

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

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A)  H1:  ρ\rhoρ xy = 0
B)  H1:  ρ\rhoρ xy > 0
C)  H0:  ρ\rhoρ xy = 0
D)  H0:  ρ\rhoρ xy > 0

Question 15

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

Question 16

Which of the following indicates a nonsignificant correlation?

Accepted Answer

A)  p 
B)  p 
C)  p = 0.02
D)  p = 0.30

Question 17

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

Question 18

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

Question 19

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

Accepted Answer

Example: Higher crim...

Question 20

A significant correlation does not indicate causality.

Accepted Answer

A) True 
 B)False

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

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?

Correct AnswerverifiedThe obtained value (0.213)is less than t...View AnswerShow Answer

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

Correct AnswerverifiedAn example of a null hypothesi...View AnswerShow Answer

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

Correct AnswerverifiedAn example of a research hypothesis for ...View AnswerShow Answer

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

Correct AnswerverifiedB

What is another term for a positive correlation?

Correct AnswerverifiedShow Answer

Correlations can be used to examine the differences between groups.

Correct AnswerverifiedFalse

What is another term for a negative correlation?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Another term for a direct correlation is ______

Correct AnswerverifiedShow Answer

Which of the following indicates a nonsignificant correlation?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedExample: Higher crim...View AnswerShow Answer

A significant correlation does not indicate causality.

Correct AnswerverifiedShow Answer

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C

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?

Correct Answer
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The obtained value (0.213)is less than t...
View Answer

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An example of a null hypothesi...
View Answer

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An example of a research hypothesis for ...
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In the equation r₍₆₅₎ = 0.45,p < 0.05,what does r represent?

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B

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False

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

Correct Answer
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Example: Higher crim...
View Answer

Correct Answer
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