Which of the following will reduce the value of the power in a statistical test

Question

Which of the following will reduce the value of the power in a statistical test of hypotheses? All of the above Reject the null hypothesis only if the P-value is smaller than the level of significance. Decrease the type II error probability. Decrease the sample size. Which of the following will reduce the value of the power in a statistical test of hypotheses? All of the above Reject the null hypothesis only if the P-value is smaller than the level of significance. Decrease the type II error probability. Decrease the sample size.

Explanation / Answer

Reject the null hypothesis only if the P-value is smaller than the level of significance. [WRONG, because this is by definition. This does not change anything.]

Decrease the type II error probability. [WRONG. This increase Power, as Power = 1 - P(Type II).]

The correct answer is

OPTION D: Decrease the sample size. [ANSWER]

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