7.Mean D is 12, and the standard deviation of the difference scores is 6. Cohen's D is

a.2

b.8

c..5

d.4

8.If I tell you that the 95%confidence interval is 5+or -2,this means

a.the mean sample difference is between 3 and 7

b.none of the answers are correct

c.95% of the null population means will be between 3and 7

d.95% of the alternate population true means will be between 3 and 7

9.to calculate the standard error for the related measures T test we

a.neither answer is correct

b.use the difference scores

c.use all the scores from Time 1 and time 2

10.I have the following before and after data.What scores would i use to calculate the standard error?

BeforeAfter

54

62

43

41

a.5, 6, 4, 4, 4, 2, 3, 1

b.there is not enough information to answer the question

c.1, 4, 1, 3

11.A potential problem with the related measures t test is

a.all of the responses are potential problems for the related measures T test.

b.excess variation which creates noise

c.inequality of variances

d.order effects

12.If the number of pairs of scores for a study is 30,then the df is

a.28

b.29

c.30

d.31