Specify the population characteristics:

\(H_0: \mu_0 = \)
\(H_a: \mu_a=\)
\(\sigma =\)
Or enter a standardized effect size
\( \frac{\mu_a - \mu_0}{\sigma} = \delta = \)

Specify the properties of the test:

Type of test	Two-tails Positive one-tail Negative one-tail
Type I error rate, \(\alpha =\)
Power=
Sample size, \(n=\)

Enter the population characteristics by entering either the mean and standard deviation of each population or the standardized effect size. Select the type of test and the Type I error rate. Enter either a desired power value or a sample size and click the corresponding button to either Calculate minimum sample size or Calculate power .