If a hypothesis test is found to have power 070 what is the

If a hypothesis test is found to have power = 0.70, what is the probability that the test will result in a Type II error?

A) 0.30
B) 0.70
C) p > 0.70
D) Cannot determine without more information

Solution

Note that

Power = 1 - P(not type II error)

Thus, P(type II) = 1 - Power = 1 - 0.70 = 0.30 [ANSWER, OPTION A]