A certain drug is tested for its effect on blood pressure. Sevenmale patients have their systolic blood pressure measured beforeand after receiving the drug with the results shown below (in mmHg).
Patient SBP before SBP after
1 120 125
2 124 126
3 130 138
4 118 117
5 140 143
6 128 128
7 140 146
a. (2) State, in prose, the studyhypothesis (two-tailed).
b. (2) What test statistic(s) testwould you use?
c. (2) What is the critical value ofthe test statistic?
d. (3) If the value of the teststatistic is t = 2.67, what do you conclude (reject/do not rejectis not sufficient).
