Question

1 A recent pilot study tested whether walking daily improved systolic blood pressure. For the three subjects in the study, their resting systolic blood pressure was measured at the beginning of Subject Before After a the study and again after participating in a walking program for 3 weeks. The table shows the results. Use the technology output to answer parts a through c. 125 135 i Click the icon to view the technology output. 2. 125 130 125 140 3 a. State the hypotheses to which the reported P-value refers. Let ud be the population mean of the differences d = Before – After. Choose the correct answer below. A. Ho: Md = 0 and Hai Hd <0 B. Ho: Hd = 0 and Ha: Hd >0 C. Ho: Md = 0 and Hai Hd #0 #0 and Ha: Hd = 0 D. Hold b. Explain how to interpret the P-value. Using a significance level of 0.05, does the exercise program seem beneficial to lowering blood pressure? A. Since the P-value is less than 0.05, there is insufficient evidence to suggest that the exercise program lowers blood pressure. B. Since the P-value is less than 0.05, there is sufficient evidence to suggest that the exercise program lowers blood pressure. C. Since the P-value is greater than or equal to 0.05, there is insufficient evidence to suggest that the exercise program lowers blood pressure. D. Since the P-value is greater than or equal to 0.05, there is sufficient evidence to suggest that the exercise program lowers blood pressure. c. What are the assumptions on which this analysis is based? A. The experiment is randomized and the subjects are dependent. B. The experiment is randomized and the subjects are independent. C. The experiment is randomized and there is a normal sample distribution of difference scores. D. The experiment is randomized and there is a normal population distribution of difference scores.