Question: Reconsider the tire testing experiment described in Exercise 8-27. (a) The engineer would like to demonstrate that the mean life of this new tire is

Reconsider the tire testing experiment described in Exercise 8-27.

(a) The engineer would like to demonstrate that the mean life of this new tire is in excess of 60,000 kilometers. Formulate and test appropriate hypotheses, and draw conclusions using 0.05.

(b) Suppose that if the mean life is as long as 61,000 kilometers, the engineer would like to detect this difference with probability at least 0.90. Was the sample size n 16 used in part

(a) adequate?

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