Your subjects complete a pretest to assess their cognitive skills and have a median score of

67% on the pretest. Then they complete your intervention and a post-test with the following

scores: 82%, 79%, 47%, 65%, 81%, 57%, 57%, 52% and 66%. What was the median on the

posttest?

a. 67%

b. 65%

c. 57%

d. 62%