Test Hypotheses Regarding Matched-Pairs Data
-A Pharmaceutical Company Wishes to Test

Test Hypotheses Regarding Matched-Pairs Data
-A pharmaceutical company wishes to test a new drug with the expectation of lowering cholesterol levels. Ten subjects are randomly selected and pretested. The results are listed below. The subjects were placed on the drug for a period of 6 months, after which their cholesterol levels were tested again. The results are listed below. (All units are milligrams per deciliter.) Test the company's claim that the drug lowers cholesterol levels. Use $\alpha = 0.01$ . Assume that the distribution is normally distributed.