# A cardiologist is testing the effectiveness of Propranolol versus a Diuretic for lowering systolic..

A cardiologist is testing the effectiveness

of Propranolol versus a Diuretic for lowering systolic blood pressure. Seven

participants are started on propranolol, and eight participants are started on

a diuretic. After 90 days, all participants switch to the other drug. The

systolic blood pressure readings for each participant are provided in the

following table. (This data set could be analyzed with a dependent-samples t

test. However, for the sake of practice, use the corresponding nonparametric

test.)

a State the null and alternative

hypotheses.

b Compute the appropriate nonparametric

test statistic.

c What is the critical value for α =

.05 (two-tailed test)?

d Interpret the findings.