Question 12 Using the data below, a.) generate a 95% confidence interval for the proportion of all patients with total cholesterol < 200  b.) how many patients would be required to ensure that a 95% confidence interval has a margin of error not exceeding 5%? New Drug: n=75 Placebo: n=75 Total Sample: n=150 Mean (SD) Total Serum Cholesterol  185.0 (24.5) 204.3 (21.8) 194.7 (23.2) % of patients with total cholesterol < 200 78.0%65.0%71.5%

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