Question: Each day for 200 days, a quality engineer samples 144 fuses rated at 15 A and measures the amperage at which they burn out. He

Each day for 200 days, a quality engineer samples 144 fuses rated at 15 A and measures the amperage at which they burn out. He performs a hypothesis test of H0 : ???? = 15 versus H1 : ???? ≠ 15, where ???? is the mean burnout amperage of the fuses manufactured that day.

a. On 10 of the 200 days, H0 is rejected at the 5%

level. Does this provide conclusive evidence that the mean burnout amperage was different from 15 A on at least one of the 200 days? Explain.

b. Would the answer to part

(a) be different if H0 had been rejected on 20 of the 200 days? Explain.

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