A marketing research company desires to know the mean consumption of milk per week among people over age 32
. They believe that the milk consumption has a mean of 3.1
liters, and want to construct a 98%
confidence interval with a maximum error of 0.1
liters. Assuming a standard deviation of 0.9
liters, what is the minimum number of people over age 32
they must include in their sample? Round your answer up to the next integer