Q1) Fast Service Truck Lines uses Ford Super Duty F-750 exclusively. Management complete a study of maintenance costs and found out = number of miles travelled in the year followed normal distribution. Mean of distribution was= 60,000 miles and standard deviation= 2,000 miles. 

a) What percent of Ford Super Duty F-750s logged 65,200 miles or more?

b) What percent of trucks logged more than 57,060 but less than 58,280 miles?

c) What percent of Fords travelled 62,000 miles or less in the year?

d) Is it sensible to conclude that any of trucks were driven more than 70,000 miles? Describe.