You compute the effect size by:

a. finding the difference between the mean posttest score and the mean pretest score
b. dividing the difference between the mean posttest score and the mean pretest score by the standard deviation of the posttest scores
c. subtracting the mean pretest score by the standard deviation of the posttest scores
d. adding the mean pretest score to the standard deviation of the posttest scores


Ans: B

Social Work & Human Services

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