Question: The FDA wants to compare the mean caffeine contents of two other brands of 6-oz. cola, Brand A and Brand B. Independent random samples of 6-oz. cans of each brand were selected and the caffeine content of each can be determined. The study provided the following summary information.
Construct a 99% confidence interval for the true difference between the mean caffeine contents of 6-oz. cans of Brand A and Brand B cola.