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The inside diameters of bearings used in an aircraft landing gear assembly are known to have...

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 of 15 bearings has an average inside diameter of 8.2535 cm. The hypothesis to be tested is that the mean inside bearing diameter is 8.25 cm. Use a two-sided alternative and ?=0.05.

(1) Find the P-value for this test. (2) Test the hypothesis. (3) Construct a 95% two-sided confidence interval on mean bearing diameter.

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