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Solution: The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of 0.002 ~cm . A random sample

Question: The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of \(0.002 \mathrm{~cm} .\) A random sample of 25 bearings has an average inside diameter of \(8.2535 \mathrm{~cm}\) . Test the hypothesis that the mean inside bearing diameter is \(8.25 \mathrm{~cm} .\) Use a two-sided alternative and \(\alpha=0.05\)

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