Chapter 4, Problem 38 GO Tutorial The mean breaking strength of yarn used in manufacturing drapery material is required to be at least 100 psi. Past experience has indicated that

the standard deviation of breaking strength is 1.8 psl. A random sample of nine specimen sis tested, and the average breaking strength is found to be 100.6 psi (a) Calculate the P-value round your answer to 3 significant digits. d -0.05, should the fiber be judged acceptable? (b) What is the probability of not rejecting the null hypothesis at a 0.05 if the fiber has a true mean breaking strength of 102 psi? Round your answer to 3 significant digits.

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