The diameters of steel shafts produced by a certain manufacturing process should have a mean diameter of
Question:
The diameters of steel shafts produced by a certain manufacturing process should have a mean diameter of 0.255 inches. The diameter is known to have a standard deviation of σ = 0.0001 inch. A random sample of 10 shafts has an average diameter of 0.2545 inch.
(a) Set up appropriate hypotheses on the mean µ.
(b) Test these hypotheses using α = 0.05. What are your conclusions?
(c) Find the P-value for this test.
(d) Construct a 95 percent confidence interval on the mean shaft diameter.
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a The hypotheses that should be tested in this experiment are H0 The true mean diameter is equal to ...View the full answer
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