Refer to Exercise 5.16. Graph the power curve for rejecting H0: μ ≥ $ 26 for the following values of μ: 20, 21, 22, 23, 24, 25, and 26.
a. Describe the change in the power as the value of μ decreases from μ0 = 26.
b. Suppose the value of n remains at 50 but α is decreased to α = .01. Without recalculating the values of the power, superimpose on the graph for a 5 .05 and n 5 50 the power curve for α = .01 and n = 50.
c. Suppose the value of n is decreased to 35 but α is kept at α = .05. Without recalculating the values of the power, superimpose on the graph for α = .05 and α = 50 the power curve for α = .05 and n = 35.