Overbooking of airline seats has now become a major problem for everyone who flies, because in order

Question:

Overbooking of airline seats has now become a major problem for everyone who flies, because in order to stay profitable despite rising fuel costs, airlines now fly at unprecedented average seat occupancy of 85%. The following are the results, occupancy rates and counts, for some flights. Assume these data represent a random sample, and test the assumption that occupancy rates are normally distributed given that the mean is 85% and the standard deviation is 5%.