13.a. n a repeated-measures studythe sample mean and variance are computed using the difference scoresfor each participant.

True

False

b. An independent-measures research study uses two samples.If the data produce a sample mean difference of 2points, and at statistic of t=2.08,and thecritical tis2.02,then which of the following is the correct decision for a two-tailed hypothesis test?

a.cannot reject the null

b.It cannot be answered without additional information.

c.can reject the null

d.can reject the null for one of the groups but not the other

c. One sample of n = 10 scores has a variance of s²= 5 and a second sample of n =10 scores has s²= 10.If the pooled variance is computed for these two samples, it will be.....

a.will be closer to 5 than to 10

b.will be closer to 10 than to 5

c.cannot be determined without more information

d.will be exactly half way between 5 and 10

d. A one sample T test with asample of n = 33 scores produces a t statistic of t = 4.00.What value will be obtained for r²?

a.r²= 16

b.r²= 2

c.r²= .33

d.r²= .03