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

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

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