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}. If the drug has a medium effect on learning such that P _real = 0.70, what is the probability you will detect the effect when doing your experiment. A) 0.2968 B) 0.0176 C) 0.2969 D) 0.0352

Question

Quizplus · Accepted Answer

The probability of detecting the effect (power of the test) can be calculated using the binomial distribution with n = 15, p = 0.70, and considering the two-tailed nature of the test. The correct probability is approximately 0.2969.

You Are Considering Testing a New Drug That Is Supposed