PSY-3301 Chapter 6 MC Quiz (Set 2)

Question 1

0 out of 5 points

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

Question 2

0 out of 5 points

In order for the correlation coefficient to be negative, which of the following must be true?

Question 3

5 out of 5 points

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

Question 4

5 out of 5 points

If two variables are ratio scaled and the relationship is linear, what type of correlation coefficient is most appropriate?

Question 5

5 out of 5 points

Rho is used _________.

Question 6

5 out of 5 points

When deciding which measure of correlation to employ with a specific set of data, you should consider _________.

Question 7

0 out of 5 points

The proportion of variance accounted for by a correlation between two variables is determined by _________.

 

Question 8

5 out of 5 points

A relationship can be _________.

Question 9

5 out of 5 points

Pearson r is _______.

Question 10

0 out of 5 points

Knowing nothing more than that IQ and memory scores are correlated 0.84, you could validly conclude that _________.

Question 11

0 out of 5 points

In a positive relationship, _________.

Question 12

5 out of 5 points

Correlation implies causation.

Question 13

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 14

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 15

0 out of 5 points

If the correlation between variables X and Y is 0.95, which of the following is true?

Question 16

0 out of 5 points

Correlation and regression differ in that _________.

Question 17

0 out of 5 points

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 18

5 out of 5 points

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

Question 19

5 out of 5 points

If the correlation between two variables is -1.00 and the score of a given individual is 2.20 standard deviations above the mean on one of the variables, we would predict a score on the second variable of _________.

Question 20

0 out of 5 points

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