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3 - An automotive manufacturer has selected ten car seats to study the Rockwell hardness of the seat recliner mechanism. A sample of 10 seats

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3 - An automotive manufacturer has selected ten car seats to study the Rockwell hardness of the seat recliner mechanism. A sample of 10 seats has an average (X bar) of 44.795 and a standard deviation (s) of 0.402 for Rockwell hardness measurements. At a 95% confidence level, what is the interval for the population mean (u)? (Round your answer to three decimal places.)

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