1...a. A sample of difference scores has dfof 12,mean of M_D= 4 with a standard deviation= 16.If effect size is measured using Cohen's d, what is the value of d?

a.d = .25

b.d = 1

c.d = .33

d..001

1b. A related measures study with an n of 20 produces a M_Dof 4 and a variance of 49.For this study, Cohen's d = ____.

a.Cohen's d = 4/7

b.Cohen's d = 4/49

c.Cohen's d = 2/7

d.Cohen's d = 2/20

c. An independent-measures study has one sample with n = 11 and a second sample with n = 14 to compare two experimental treatments.What is the df value for the t statistic for this study?

a.23

b.25

c.24

d.20

d. A repeated-measures study and an independent-measures study both produce a t statistic with df = 20.The independentmeasures study used more subjects than the repeated measures study.

1.True

2.False