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

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Question 41

Multiple Choice

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

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

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Question 42

Multiple Choice

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Which of the following indicates a significant correlation?

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

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Question 43

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

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

Statistically significant correlations cannot show ______.

What is the most important characteristic of a correlation coefficient?

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

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

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

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

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

The level of significance or Type I error typically set for testing the level of significance of 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?

With correlations,tests can be either directional or nondirectional.

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

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

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

The correlation coefficient measures ______.