Refer to Exhibit 14-1. What value for the missing mean would result in no interaction (SSA x B = 0)?
Exhibit 14-1- Treatment means.

B1 B2
A1 M = 6 M = 8
A2 M = 12 M = ?

2

10

12

14

A Pearson correlation of r = -0.85 indicates that a graph of the data would show __________.

points clustered close to a line that slopes up to the right

points clustered close to a line that slopes down to the right

points widely scattered around a line that slopes up to the right

points widely scattered around a line that slopes down to the right

A set of n = 5 pairs of X and Y values has SX = 10, SY = 20, and SXY = 60. For this set of scores, the value of SP is __________.

-20

-28

20

60

Suppose the correlation between height and weight for adults is +0.80. What proportion (or percent) of the variability in weight can be explained by the relationship with height?

80%

64%

100 - 80 = 20%

40%

For a sample of n = 20 individuals, how large a Pearson correlation is necessary to be sta-tistically significant for a two-tailed test with a = .05?

0.444

0.433

0.423

0.413

A researcher is using a chi-square test to determine whether there are any preferences among four brands of cola. With a = .05 and a sample of n = 30, what is the boundary for the critical region for the hypothesis test?

7.81

9.49

42.56

43.77

A chi-square test for goodness of fit is used to test whether or not there are any prefer-ences among three brands of cola. If the study uses a sample of n = 60 subjects, then the ex-pected frequency for each category would be __________.

1

15

20

30

A chi-square test for independence has df = 2. What is the total number of categories (cells in the matrix) that were used to classify individuals in the sample?

2

3

4

6

A sample of 100 people is classified by gender (male/female) and by whether or not they are registered voters. The sample consists of 80 females and 20 males, and has a total of 60 regis-tered voters. If these data were used for a chi-square test for independence, the expected frequen-cies should have __________ males who are registered voters.

12

20

40