Question: In a study testing the effects of an herbal supplement on systolic blood pressure in men, 9 randomly selected men are given an herbal supplement for 15 weeks. The following measurements are for each subject’s systolic blood pressure taken before and after the 15-week treatment period. At α = .10, can you support the claim that systolic blood pressure was lowered? (4 pts)

a. Is the claim the null or research hypothesis?

b. What’s d-bar?

c. What’s the p-value?

d. If you decide to reject the null hypothesis, you’ve made

a. The correct decision

b. A Type I error

c. A Type II error