Statistics, Confidence Intervals.

Question

A soft drink manufacturer wishes to know how many soft drinks males over age 26 drink in a week. Their consultant thinks that the mean is 4.3 soft drinks per week. Assume a previous study found the standard deviation to be 1.2. How large of a sample would be required in order to estimate the mean number os soft drinks per week consumed by males over age 26 at the 99% confidence level with an error of at most .07 soft drinks.

Answer 1