A nutritionist is investigating the effects of a rigorous walking progress on systolic blood pressure (SBP) in patients with mild hypertension. Subjects who agree to participate have their systolic blood pressure measured at the study and then after completing the 6-week walking program. The data are as follows:

SubjectStarting BP Ending BP

1140128

2130125

3150140

4160162

5135137

6128130

7142135

8151140

9120135

10144157

Test if there is evidence that SBP is significantly changed by the walking program? Run

the appropriate test at the 1% level of significance. Use a two-tailed test for the alternative hypothesis.

(a) State the null and alternative hypothesis for this test.

(b) Calculate the test statistic and the critical value.

(c) Graph your curve and mark the critical value(s) and rejection region.

(d) Based on the test statistic and the critical value, state your conclusion.

(e) Construct a 90% confidence interval estimate for the true average differences of systolic blood pressure (SBP)