If a study conducted at the .05 significance level has 80% power
A)alpha = 5%,beta = 80%
B)alpha = 5%,beta = 20%
C)alpha = 95%,beta = 80%
D)alpha = 95%,beta = 20%

Question

Quizplus · Accepted Answer

In statistical hypothesis testing, the significance level (alpha) is the probability of rejecting the null hypothesis when it is true, set at 5% in this case. Power is the probability of correctly rejecting the null hypothesis when it is false, which is 80%. Beta is the probability of failing to reject the null hypothesis when it is false, which is 100% - 80% = 20%. Therefore, the correct answer is B) alpha = 5%, beta = 20%.

If a Study Conducted at the