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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

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.

b) Test if there is a significant difference in the proportions of hypertensive patients between groups using =0.05.

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