Question 1

This is another word for a negative correlation.

Accepted Answer

A)  direct correlation
B)  weak correlation
C)  indirect correlation
D)  strong correlationE) None of the above
F) A) and B)

Question 2

"The better your time management skills are,the more work you are able to do" is an example of a ______.

Accepted Answer

A)  continuous correlation
B)  biserial correlation
C)  positive correlation
D)  negative correlationE) A) and B)
F) All of the above

Question 3

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

Accepted Answer

A)  point biserial
B)  phi
C)  Spearman rank
D)  PearsonE) A) and D)
F) A) and C)

Question 4

The correlation between variable X and variable Y is represented by which of the following?

Accepted Answer

A)  R(xy) 2
B)  rxy
C)  rx(y) 
D)  Rx / yE) A) and D)
F) A) and C)

Question 5

Correlation coefficients describe every individual person in your data set.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is the weakest correlation?

Accepted Answer

A)  -0.24
B)  -0.22
C)  0.19
D)  -0.96E) A) and D)
F) A) and C)

Question 7

When data points group together in a cluster from the upper left-hand side of the xy axis to the lower right-hand side,what is this?

Accepted Answer

A)  negative slope
B)  positive slope
C)  positive intercept
D)  negative interceptE) A) and B)
F) B) and D)

Question 8

If X decreases in value as Y increases in value,what type of correlation exists?

Accepted Answer

A)  positive correlation
B)  direct correlation
C)  negative correlation
D)  no correlationE) None of the above
F) B) and C)

Question 9

Correlation coefficients are used to describe ______.

Accepted Answer

A)  a group
B)  individuals
C)  individuals as well as the group
D)  this depends on the correlation coefficient usedE) B) and C)
F) C) and D)

Question 10

A correlation coefficient comparing exercise and body mass is -.67.What does this say about the relationship between exercise and weight?

Accepted Answer

If exercise / body mass = -.67...

Question 11

If the correlation between variables is 0.80,what is the coefficient of determination?

Accepted Answer

A)  0.20
B)  0.34
C)  0.64
D)  0.80E) None of the above
F) A) and B)

Question 12

Which of the following is the strongest correlation?

Accepted Answer

A)  0.21
B)  0.87
C)  0.44
D)  -0.92E) B) and C)
F) All of the above

Question 13

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

Accepted Answer

A)  scatterplot
B)  correlation
C)  correlation matrix
D)  scatterplot matrixE) A) and C)
F) C) and D)

Question 14

If the coefficient of determination between two variables is 0.81,what is the coefficient of alienation?

Accepted Answer

A)  0.19
B)  0.34
C)  0.66
D)  0.90E) B) and C)
F) A) and D)

Question 15

If X increases in value as Y increases,what type of correlation exists?

Accepted Answer

A)  positive correlation
B)  negative correlation
C)  no correlation
D)  inverse correlationE) A) and C)
F) B) and C)

Question 16

The coefficient of determination is more precise than using a correlation coefficient alone.

Accepted Answer

A) True 
 B)False

Question 17

In certain cases,Pearson's product-moment correlation coefficient can have values greater than 1.

Accepted Answer

A) True 
 B)False

Question 18

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?

Accepted Answer

A)  negative slope
B)  positive slope
C)  negative intercept
D)  positive interceptE) None of the above
F) A) and D)

Question 19

A negative correlation indicates that variables change in opposite directions.

Accepted Answer

A) True 
 B)False

Question 20

A positive correlation between two variables would be represented in a scatterplot as ______.

Accepted Answer

A)  a line sloping upward
B)  a line sloping downward
C)  a horizontal line
D)  a vertical lineE) None of the above
F) A) and C)

Exam 5: Computing Correlation Coefficients: Ice Cream and Crime

In certain cases,Pearson's product-moment correlation coefficient can have values greater than 1.

Correct AnswerverifiedShow Answer

If the correlation between variables is 0.80,what is the coefficient of determination?

Correct AnswerverifiedShow Answer

"The better your time management skills are,the more work you are able to do" is an example of a ______.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The correlation between variable X and variable Y is represented by which of the following?

Correct AnswerverifiedShow Answer

Which of the following is the weakest correlation?

Correct AnswerverifiedShow Answer

Correlation coefficients are used to describe ______.

Correct AnswerverifiedShow Answer

If X decreases in value as Y increases in value,what type of correlation exists?

Correct AnswerverifiedShow Answer

When data points group together in a cluster from the upper left-hand side of the xy axis to the lower right-hand side,what is this?

Correct AnswerverifiedShow Answer

This is another word for a negative correlation.

Correct AnswerverifiedShow Answer

A positive correlation between two variables would be represented in a scatterplot as ______.

Correct AnswerverifiedShow Answer

If X increases in value as Y increases,what type of correlation exists?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The coefficient of determination is more precise than using a correlation coefficient alone.

Correct AnswerverifiedShow Answer

A negative correlation indicates that variables change in opposite directions.

Correct AnswerverifiedShow Answer

A correlation coefficient comparing exercise and body mass is -.67.What does this say about the relationship between exercise and weight?

Correct AnswerverifiedIf exercise / body mass = -.67...View AnswerShow Answer

If the coefficient of determination between two variables is 0.81,what is the coefficient of alienation?

Correct AnswerverifiedShow Answer

Correlation coefficients describe every individual person in your data set.

Correct AnswerverifiedShow Answer

Which of the following is the strongest correlation?

Correct AnswerverifiedShow Answer

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If exercise / body mass = -.67...
View Answer

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