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 difference in mean total cholesterol levels between treatments.
1. Upper limit of CI: (2 points)
2. Lower limit of CI: (2 points)
3. Based on the confidence interval which of the following is (are) true? (4 points)
a. There is significant evidence, alpha=0.05, to show that there is a difference in Total
Serum Cholesterol between treatments New Drug and Placebo.
b. There is not significant evidence, alpha=0.05, to show that there is a difference in
Total Serum Cholesterol between treatments New Drug and Placebo.
c. The difference between Total Serum Cholesterol between treatments New Drug and
Placebo is essentially 0.
d. b and c.
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