The main trial in the previous problem 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 here 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%

Test if there is a significant difference in mean systolic blood pressures between groups using = 0.05. What is the numeric result for test statistics?

Follow the hypothesis testing steps:

1. Set up hypotheses and determine level of significance

2. Select the appropriate test statistic. Write the formula you choose.

3. Set up decision rule.

4. Compute the test statistic.

5.Interpretthe result.