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If the correlation between variables is .60, what is the coefficient of alienation?


A) .36
B) .40
C) .60
D) .64

E) C) and D)
F) All of the above

Correct Answer

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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?


A) negative slope
B) positive slope
C) positive intercept
D) negative intercept

E) None of the above
F) B) and C)

Correct Answer

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What type of correlation exists if the less money you put in the bank, the less interest you will earn?


A) positive correlation
B) negative correlation
C) indirect correlation
D) none of the above

E) All of the above
F) B) and C)

Correct Answer

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Which of the following correlations would be interpreted a moderate relationship?


A) .25
B) .35
C) .45
D) .65

E) A) and D)
F) None of the above

Correct Answer

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

A) True
B) False

Correct Answer

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If variables change in the opposite direction, what type of correlation is this called?


A) positive correlation
B) negative correlation
C) positive causation
D) negative causation

E) A) and C)
F) C) and D)

Correct Answer

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When testing partial correlation, the impact of a third variable is ______.


A) added
B) removed
C) deleted
D) reduced

E) All of the above
F) C) and D)

Correct Answer

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What is the purpose of a scatterplot?

Correct Answer

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The shape of the plotted data points on ...

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


A) positive correlation
B) direct correlation
C) negative correlation
D) no correlation

E) A) and C)
F) A) and D)

Correct Answer

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How does a positive slope differ from a negative slope?

Correct Answer

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A correlation coefficient is a...

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Which of the following is an example of a correlation?


A) mean
B) variance
C) phi coefficient
D) standard deviation

E) All of the above
F) A) and B)

Correct Answer

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If you wanted to compute the correlation between one nominal-level variable and one interval-level variable, which type of correlation should you use?


A) point biserial
B) phi
C) Spearman rank
D) Pearson

E) A) and D)
F) A) and C)

Correct Answer

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If variables change in the same direction, what type of correlation is this called?


A) positive correlation
B) negative correlation
C) positive causation
D) negative causation

E) B) and C)
F) All of the above

Correct Answer

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What would you use to visually represent a correlation?


A) histogram
B) polygon
C) line graph
D) scatterplot

E) A) and B)
F) A) and C)

Correct Answer

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This is another word for a negative correlation.


A) direct correlation
B) weak correlation
C) strong correlation
D) indirect correlation

E) A) and D)
F) A) and C)

Correct Answer

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If the correlation between variables is .70, what percentage of the variance is not shared variance?


A) 70%
B) 51%
C) 49%
D) 30%

E) A) and D)
F) A) and C)

Correct Answer

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


A) positive correlation
B) negative correlation
C) neutral correlation
D) no correlation

E) A) and B)
F) None of the above

Correct Answer

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