# PSY-3301 Chapter 6 MC Quiz (Set 3)

Question 1

0 out of 5 points

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In order to properly use rho, the variables must be of at least _______ scaling.

Question 2

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A correlation of r = 0.60 exists between a set of X and Y scores. If a constant of 10 is added to each score of both distributions, the value of r will _______.

Question 3

0 out of 5 points

Which of the following statements concerning Pearson r is not true?

Question 4

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It is possible to compute a coefficient of correlation if one is given _________.

Question 5

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Which of the following is (are) not correlation coefficients?

Question 6

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Correlation implies causation.

Question 7

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A correlation between college entrance exam grades and scholastic achievement was found to be -1.08. On the basis of this you would tell the university that _________.

Question 8

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A traffic safety officer conducted an experiment to determine whether there is a correlation between people’s ages and driving speeds. Six individuals were randomly sampled and the following data were collected.

Age Y

20

25

45

46

60

65

Speed X (mph)

60

47

55

38

45

35

The proportion of variability of Y accounted for by X is _________.

Question 9

0 out of 5 points

Which of the following is (are) not correct interpretations of Pearson r?

Question 10

0 out of 5 points

For the following X and Y scores, how much of the variability of Y is accounted for by knowledge of X? Assume a linear relationship.

X

20

15

6

10

Y

6

5

4

0

Question 11

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Pearson r can be properly used on which of the following type(s) of relationships?

Question 12

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In a positive relationship, _________.

Question 13

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What is the value of r for the following relationship between height and weight?

Height

60

64

65

68

Weight

103

122

137

132

Question 14

0 out of 5 points

In a positive relationship, _________.

Question 15

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In the equation Y = bX + a, X and Y, a is _________.

Question 16

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Which of the following values of r represents the strongest degree of relationship between two variables?

Question 17

0 out of 5 points

If one takes a sample of pairs of points over a narrow range of X or Y scores, what effect might this have on the value of r?

Question 18

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If a correlation is perfect,

Question 19

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Correlation and regression differ in that _________.

Question 20

0 out of 5 points

If N is small, an extreme score _________.