PSY-3301 Chapter 6 MC Quiz (Set 11)
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
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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
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Which of the following is (are) not correct interpretations of Pearson r?
Question 10
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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
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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
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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
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If N is small, an extreme score _________.