Controlling Cholesterol The Westbrook Pharmaceutical Company manufactures atorvastatin pills, designed to lower cholesterol levels. Listed below are the amounts (in mg) of atorvastatin in a random sample of the pills. Use a 0.05 significance level to test the claim that the pills come from a population in which the mean amount of atorvastatin is equal to 25 mg.

24.1 24.4 24.3 24.9 24.1 26.2 25.1 24.7 24.4 25.0 24.7 25.1 25.3 25.5 25.5