Consider the two testing problems in parts (a) and (b) of Example 8 2 1, and suppose that the tread life spans are approximately normally distributed and the population variance 2 is known Let X C1 and X C2 be the rejection regions for the testing problems in parts (a) and (b), respectively Determine the values of C1 and C2 so the tests have level of significance 0 05

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Question: Consider the two testing problems in parts (a) and (b) of Example 8.2-1, and suppose that the tread life spans are approximately normally distributed and

Consider the two testing problems in parts

(a) and

(b) of Example 8.2-1, and suppose that the tread life spans are approximately normally distributed and the population variance σ2 is known. Let X ≤ C1 and X ≥ C2 be the rejection regions for the testing problems in parts

(a) and (b), respectively. Determine the values of C1 and C2 so the tests have level of significance α = 0.05.

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