You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Because there is relatively little known about the drug, you plan to use a nondirectional alternative hypothesis. Since your resources are limited, you can test only 15 subjects. The subjects will be run in a repeated measures design and the data will be analyzed with the sign test, using a = 0.05 2 tail.
Refer to Exhibit 11-1. If the drug has a moderate effect on learning such thatPreal= 0.70, what is the probability you will detect the effect when doing your experiment.