Fast Service Truck Lines employs the Ford Super Duty F-750 exclusively. Management made the study of maintenance costs and determined the number of miles traveled throughout the year followed the normal distribution. The mean of distribution was 60,000 miles and standard deviation 2,000 miles.
- Find out the percent of the Ford Super Duty F-750s logged 65,200 miles or more?
- Find out the percent of the trucks logged more than 57,060 but less than 58,280 miles?
- Find out the percent of the Fords traveled 62,000 miles or less during the year?
- Is it reasonable to conclude that any of the trucks were driven more than 70,000 miles? describe.