Exam 5: Ice Cream and Crime: Computing Correlation Coefficients

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This is a situation in which the correlation between two variables begins as a direct correlation, then becomes an indirect correlation, or vice versa.

(Multiple Choice)

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Question 21

In the formula for the Pearson correlation coefficient, what is the difference between the sum of a set of values squared and the sum of the squared values?

(Essay)

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Question 22

In a partial correlation, the impact of mediating variable is removed.

(True/False)

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Question 23

A correlation coefficient is numerical index that reflects the relationship between ______>

(Multiple Choice)

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Question 24

When interested in examining how one variable changes in relation to another, which of the following descriptive statistics would you want to use?

(Multiple Choice)

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Question 25

"The more oatmeal you eat, the lower your blood cholesterol level" is an example of a _______.

(Multiple Choice)

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Question 26

If we use Spearman rank coefficient correlation, what are the levels of measurement for both independent and dependent variables?

(Multiple Choice)

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Question 27

The Pearson product-moment correlation examines the relationship between what type of variables?

(Multiple Choice)

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Question 28

The amount of unexplained variance in a relationship between two variables is called _______.

(Multiple Choice)

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Question 29

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

(Multiple Choice)

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Question 30

Which of the following is the strongest correlation?

(Multiple Choice)

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Question 31

If the correlation between two variables was equal to 0, the scatterplot between these two variables would be represented as ______.

(Multiple Choice)

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Question 32

How is a direct correlation different from an indirect correlation?

(Essay)

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Question 33

If the coefficient of determination between two variables is .81, what is the coefficient of alienation?

(Multiple Choice)

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Question 34

If two variables are correlated, this implies that one variable causes the other.

(True/False)

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Question 35

Pearson's product-moment correlation coefficient is represented by the following letter:

(Multiple Choice)

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Question 36

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

(Multiple Choice)

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Question 37

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?

(Multiple Choice)

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Question 38

Correlation coefficients are used to describe ______.

(Multiple Choice)

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Question 39

Is a correlation of 0.6 stronger than a correlation of -0.9? Why or why not?

(Essay)

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Question 40

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Exam 5: Ice Cream and Crime: Computing Correlation Coefficients

This is a situation in which the correlation between two variables begins as a direct correlation, then becomes an indirect correlation, or vice versa.

In the formula for the Pearson correlation coefficient, what is the difference between the sum of a set of values squared and the sum of the squared values?

In a partial correlation, the impact of mediating variable is removed.

A correlation coefficient is numerical index that reflects the relationship between ______>

When interested in examining how one variable changes in relation to another, which of the following descriptive statistics would you want to use?

"The more oatmeal you eat, the lower your blood cholesterol level" is an example of a _______.

If we use Spearman rank coefficient correlation, what are the levels of measurement for both independent and dependent variables?

The Pearson product-moment correlation examines the relationship between what type of variables?

The amount of unexplained variance in a relationship between two variables is called _______.

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

Which of the following is the strongest correlation?

If the correlation between two variables was equal to 0, the scatterplot between these two variables would be represented as ______.

How is a direct correlation different from an indirect correlation?

If the coefficient of determination between two variables is .81, what is the coefficient of alienation?

If two variables are correlated, this implies that one variable causes the other.

Pearson's product-moment correlation coefficient is represented by the following letter:

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

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 are used to describe ______.

Is a correlation of 0.6 stronger than a correlation of -0.9? Why or why not?

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