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17 points Save Ana QUESTION 13 13) A group of medical researchers are developing a treatment program that is intended to reduce blood pressure levels of patients who are at risk of heart diseases. They have selected a random sample of 12 patients and measured their systolic blood pressure levels. Then they were given the treatment for 4 weeks and remeasured the systolic blood pressure levels. The observations before and after the treatment program are shown below: Patient 2 Before 134 After 132 1 145 134 3 155 145 4 140 143 For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac) BIUS v Paragraph Arial FE LE 38830 >> (0) Use 5% significance level to test the claim that the treatment program lowers the systolic blood pressure level on average. a) What are the null and alternative hypotheses for this test? 5 138 134 d) What is the p-value? Give four decimal places e) What is your conclusion? Explain in terms of the claim that the treatment lowers the blood pressure level. x²x₂ & 8 ¶ ¶ E 6 150 146 10pt b) What are the mean differences (before-after) and the standard deviation of differences for this sample of 12 patients? Give two decimal places. e) What is value of the test statistic? Give four decimal places - 7 148 134 8 152 150 9 129 125 EV AV I. X ✓ 1" 22@. BBQ 10 142 138 11 149 140 *** 田田田四 12 137 132