The following data were collected in a clinical trial to compare a new drug to a placebo for its effectiveness in lowering total serum cholesterol. Generate a 95% confidence interval for the proportion of all patients with total cholesterol < 200
1) Upper limit of CI
2) Lower limit of CI
3) How many patients would be required to ensure that a 95% confidence interval has a margin of error not exceeding 5% n=
New Drugs Placebo Total Sample
n=75 n=75 n=150
Mean (SD) Total serum 185.0 (24.5) 204.3(21.8) 194.7(23.2)
Cholesterol
% patients with total 78% 65.0% 71.5%
Cholesterol<200