The main trial in Problem 7 is conducted and involves a total of 200 patients.Patients are enrolled and randomized to receive either the experimental medication or the placebo.The data shown below are data collected at the end of the study after 6 weeks on the assigned treatment.

Experimental (n=100)

Placebo (n=100)

Mean (SD) Systolic Blood Pressure

120.2 (15.4)

131.4 (18.9)

% Hypertensive

14%

22%

% With Side Effects

6%

8%

a.Test if there is a significant difference in mean systolic blood pressures between groups using []=0.05.