Question: Problem 2.6

In problem 2.5, it was stated that mean tire life is 50,000 miles, and you calculated the standard deviations of tire life for each tire type. Use this information to calculate:
(a) The probability that a sample of 25 all weather tires will have an average tire life of more than 52,000 miles.
(b) The probability that a sample of 100 all weather tires will have an average life of more than 52,000 miles.
(c) The probability that a sample of 5 high performance tires will have an average life of less than 40,000 miles.
(d) The probability that a sample of 30 high performance tires will have an average life of less than 40,000 miles.