e) Estimate the p-value, and explain what does it represent? (2 marks) F) What conclusion do you reach about the effectiveness of exercise in reducing systol blood pressure on adults? State your conclusion in plain language (2 marks).

for Research Page 5 of 8 Question 5. An investigator theorizes that adults who participate in a regular exercise program will have lower levels of systolic blood pressure than those adults who do not participate in a regular exercise program. To test this hypothesis, the investigator randomly assigns 36 individuals to an exercise program for 10 weeks and 46 individuals to a non- exercise group. The blood pressure of all participants was measured after ten weeks of the study. The data for all participants are summarized in a table below (14 marks) Groups Systolic blood pressure after 10 weeks n Mean Standard Deviation Exercise 36 127.0 9.2 Non-exercise 46 134.0 11.1 a) State appropriate null and alternative hypotheses concerning the population means. (1 mark) b) What statistical test is appropriate to test the hypotheses you stated in (a), why? (2 marks) c) Is the test you chose in (b) "Robust"? If yes, what does robust mean? (1 marks) d) For the test chosen in (b), calculate relevant test statistics, and degrees of freedom, and find critical value using appropriate table at 5 percent significance level. (6 marks)