The null hypothesis in a repeated measures t test is
a. the hypothesis that the mean difference score is equal to 0.
b. the hypothesis that the mean difference score is different from 0 in either direction.
c. the hypothesis that post scores are larger than pre-scores.
d. the hypothesis that the variance of scores stays constant from pretest to posttest.
Question 2
A repeated measures t test is more likely to lead to rejection of the null hypothesis if
a. subjects show considerable variability in their change scores.
b. many subjects show no change.
c. some subjects change a lot more than others.
d. the degree of change is consistent across subjects.
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