Suppose that 18 out of 54 identical repetitions of an experiment comparing two methods of instruction lead to non-significant results. If method of instruction does, in fact, have an effect, our best estimate of power for this situation is
A) .67
B) .18
C) .33
D) .36

Question

Quizplus · Accepted Answer

Power is the probability of correctly rejecting the null hypothesis. If 18 out of 54 experiments lead to non-significant results, then 36 out of 54 lead to significant results. Thus, the power is 36/54 = 0.67.

Suppose That 18 Out of 54 Identical Repetitions of an Experiment