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Question: Engine parts Here are measurements (in millimeters) of a critical dimension on an SRS of 16 of the more than 200 auto engine crankshafts produced in one day:

(a) Construct and interpret a 95% confidence interval for the process mean at the time these crankshafts were produced.

(b) The process mean is supposed to be μ = 224 mm but can drift away from this target during production. Does your interval from part (a) suggest that the process mean has drifted? Explain.

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