Solved: A study was conducted to determine whether

Chapter 12, Problem 12.70

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A study was conducted to determine whether lifestyle changes could replace medication in reducing blood pressure among hypertensives. The factors considered were a healthy diet with an exercise program, the typical dosage of medication for hypertension, and no intervention. The pretreatment body mass index (BMI) was also calculated because it is known to aect blood pressure. The response considered in this study was change in blood pressure. The variable group had the following levels.1 = Healthy diet and an exercise program 2 = Medication 3 = No intervention(a) Fit an appropriate model using the data below. Does it appear that exercise and diet could be eectively used to lower blood pressure? Explain your answer from the results. (b) Would exercise and diet be an eective alternative to medication? (Hint: You may wish to form the model in more than one way to answer both of these questions.) Change in Blood Pressure Group BMI 32 21 26 16 11 19 23 5 6 5 11 14 1 1 1 1 2 2 2 2 3 3 3 3 27.3 22.1 26.1 27.8 19.2 26.1 28.6 23.0 28.1 25.3 26.7 22.3