As the effect size increases the power of a hypothesis test also increases, but what happens to alpha?

Ty Moore

Ty Moore

Answered question

2022-11-16

As the effect size increases the power of a hypothesis test also increases, but what happens to alpha?

Answer & Explanation

Falpo359

Falpo359

Beginner2022-11-17Added 15 answers

The effect size does not change α. The significance level α is determined before; usually α = 0.05 is chosen. The significance level is the probability of rejecting a true null hypothesis. This does not depend on the effect size, as the effect size says something about what happens when the null hypothesis is not true.

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