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, usinga= 0.05_{2 tail}.

Refer to Exhibit 11-1. If the drug has a moderate effect on learning such thatP_real= 0.70, what is the probability you will detect the effect when doing your experiment.

0.2968

0.0176

0.2969

0.0352