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What can the engineer conclude about the manufacturers

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Reference no: EM13623516

An engineer measures the diameter of 20 tubes selected at random from a large shipment. The sample yields a sample mean of 47.5 mm and a sample standard deviation of 8.4 mm. The manufacturer of the tubes claims that the true mean is 42.1 mm. What can the engineer conclude about the manufacturer's claim? Support your answer with calculations and explain the rationale for your decision.

Reference no: EM13623516

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