Power of a Test on a Population Mean

Instructions
  • Enter values for: Null mean (u0), Alternate mean (u1), Level (alpha), Sample size, and Population standard deviation.
  • Choose the form of the alternate hypothesis (u < u0, u > u0, or u not = u0) from the drop-down list.
  • Click "Show Graph" to see the probability density functions for both the null and alternate distributions of the sample mean on the same horizontal axis. The rejection region will be shaded. The boundary of the rejection region and the power will be calculated and displayed.
  • To restore the default values, click "Reset".

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