Question: Having problems with p valueNeed answers for c & d A trucking firm suspects that the mean life of a certain tire it uses is

Having problems with p valueNeed answers for c & d

A trucking firm suspects that the mean life of a certain tire it uses is less than the advertised 45,000 miles. To check the claim, the firm randomly selects and tests 22 of these tires and gets a sample mean lifetime of 44,850 miles with standard deviation of 1200 miles. c) At a = 0.01, test the advertisement's claim. d) Complete the hypothesis test and compare with your guess in part a

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