Captopril is a drug designed to lower systolic blood pressure. The systolic blood pressure reading (mmHg)...

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Captopril is a drug designed to lower systolic blood pressure. The systolic blood pressure reading (mmHg) of subjects were measured before and after they took the drug. Results are given in the accompanying table (based on data from "Essential Hypertension: Effect of an Oral Inhibitor of Angiotensin-Converting Enzyme," by MacGregor et al., British Medical Journal, Vol. 2). Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Complete parts (a) and (b). Before After 209 170 183 167 182 200 179 210 155 198 151 191 159 177 146 145 177 169 193 174 176 170 185 159 a. Use a 0.01 significance level to test the claim that captopril is effective in lowering systolic blood pressure. Define as the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the systolic blood pressure reading before captopril was taken minus the reading after captopril was taken. What are the null and alternative hypotheses for the hypothesis test? A. Ho Hd #0 H Hd=0 OC. Ho Hd 20 H Hd >0 Identify the test statistic. t = 6.37 (Round to two decimal places as needed.) Identify the P-value. B. Ho Hd=0 H Hd >0 OD. Ho Hd = 0 H Hd <0 P-value=0.0000 (Round to three decimal places as needed.) Since the P-value is than the significance level, Ho. There is evidence to the claim that captopril is effective in lowering systolic blood pressure. Captopril is a drug designed to lower systolic blood pressure. The systolic blood pressure reading (mmHg) of subjects were measured before and after they took the drug. Results are given in the accompanying table (based on data from "Essential Hypertension: Effect of an Oral Inhibitor of Angiotensin-Converting Enzyme," by MacGregor et al., British Medical Journal, Vol. 2). Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Complete parts (a) and (b). Before After 209 170 183 167 182 200 179 210 155 198 151 191 159 177 146 145 177 169 193 174 176 170 185 159 a. Use a 0.01 significance level to test the claim that captopril is effective in lowering systolic blood pressure. Define as the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the systolic blood pressure reading before captopril was taken minus the reading after captopril was taken. What are the null and alternative hypotheses for the hypothesis test? A. Ho Hd #0 H Hd=0 OC. Ho Hd 20 H Hd >0 Identify the test statistic. t = 6.37 (Round to two decimal places as needed.) Identify the P-value. B. Ho Hd=0 H Hd >0 OD. Ho Hd = 0 H Hd <0 P-value=0.0000 (Round to three decimal places as needed.) Since the P-value is than the significance level, Ho. There is evidence to the claim that captopril is effective in lowering systolic blood pressure.