Fifteen adult males between the ages of 35 and 50 participated in a study to evaluate

Chapter 10, Problem 10-41

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Fifteen adult males between the ages of 35 and 50 participated in a study to evaluate the effect of diet and exercise on blood cholesterol levels. The total cholesterol was measured in each subject initially and then three months after participating in an aerobic exercise program and switching to a low-fat diet. The data are shown in the accompanying table (a) Do the data support the claim that low-fat diet and aerobic exercise are of value in producing a mean reduction in blood cholesterol levels? Use 0.05. Find the P-value. (b) Calculate a one-sided confidence limit that can be used to answer the question in part (a).

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