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.)

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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.

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