Lab reagent, power analysis. Exercise 9.20 failed to show a significant difference in the mean concentrations in a lab reagent and the specified concentration of 5 mg/dL. Now let us assume that the true concentration of the reagent is 4.75. What was the power of the test performed in Exercise 9.20 to reject H0

: μ = 5 at α = 0.05 twosided?