The investigators of a recent study set the power at 0.80. Based on this power s

ID: 3218829 • Letter: T

Question

The investigators of a recent study set the power at 0.80. Based on this power setting, which of the following is true?

Chances of a Type I error are 10%.

Chances of a Type II error are 80%.

Beta in this study equals 20%.

The chances of rejecting the null hypothesis when it is in reality true are 8 times out of a hundred.

Chances of a Type I error are 10%.

Chances of a Type II error are 80%.

Beta in this study equals 20%.

The chances of rejecting the null hypothesis when it is in reality true are 8 times out of a hundred.

power = 0.80

We know that type II error = Beta = 1 - power

So Beta = 1 - 0.80 = 0.20

So Beta is 20%

Correct option is C. Beta in this study equals 20%.

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