A marketing manager at a rental-car agency believes that the number of miles a customer drives per week is related to the type of car rented. Independent random samples of week-long rental...

A marketing manager at a rental-car agency believes that the number of miles a customer drives per week is related to the type of car rented. Independent random samples of week-long rental reservations were obtained, and the number of miles driven was recorded for each car. The summary statistics are given in the following table.

Independent random samples of four types of 16-ounce steaks were obtained, and the amount of fat (in grams) in each was measured. Assume the underlying populations are continuous. Is there any evidence to suggest that the fat populations are different? Use a = 0.025.