Power

Explore statistical power in hypothesis testing

Explanation▾

The null sampling distribution is shown with a dashed curve. The true sampling distribution is shown with a solid curve. Choose whether to shade α, β, or power, and compare how the shaded area changes with sample size, the true parameter value, and the alternative hypothesis.

Power Inputs

Select type of test

Null hypothesis is H₀: p₀ =

True proportion p =

Sample size =

α =

Alternative hypothesis is Hₐ:

Calculate and plot:

Show rejection region

Calculated Results

α: 0.05

β: 0.3585

Power: 0.6415

The null sampling distribution is shown with a dashed line. The true sampling distribution is shown with a solid line. Power = 0.6415

Reject above 0.5822.