(Solution Library) The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of σ = 0.002 cm.
Question: The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of \(\sigma \) = 0.002 cm. A random sample of 15 bearings has an average inside diameter of 8.2535 cm.
- Test the hypothesis that the mean inside bearing diameter is 8.25 cm. Use a two-sided alternative and \(\alpha \) = 0.05.
- Find the P-value for this test.
- Construct a 95% two-sided confidence interval on the mean bearing diameter.
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