A marketing research company desires to know the mean consumption of milk per week among males over age 25
. They believe that the milk consumption has a mean of 4.7
liters, and want to construct a 99%
confidence interval with a maximum error of 0.06
liters. Assuming a standard deviation of 1.5
liters, what is the minimum number of males over age 25
they must include in their sample? Round your answer up to the next integer.



Answer :