# Compute the Power of the Test

A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a two-tailed hypothesis test with a = .05.

a. Compute the power of the test if the researcher uses a sample of n = 16 individuals

b. Compute the power of the test if the researcher uses a sample of n = 25 individuals.

https://brainmass.com/statistics/hypothesis-testing/compute-power-test-310754

#### Solution Preview

A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a two-tailed hypothesis test with a = .05.

a. Compute the power of the test if the researcher ...

#### Solution Summary

The expert computes the power of the tests using 16 and 25 individual samples. A complete, neat and step-by-step solution is provided in the attached file.