The inside diameters of bearings used in an aircraft landing
gear assembly are known to have a standard deviation of 𝜎 = 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
𝛼=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.
The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of 
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The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of 
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