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The ceo of an oil company has asked for your help in

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The CEO of an oil company has asked for your help in analyzing a confidential data associated with drilling holes. It is known that the diameter of the hole is normally distributed with population mean µ = 2 inches and standard deviation σ = 0.06 inch. A random sample of nine measurements had a sample mean of1.95 inches.

(a) Write the null hypothesis and alternative hypothesis.

(b) Using a significance level of α = 0.05, determine if the drilling machine should be adjusted.

(c) What is the p-value of the test?

Reference no: EM13578567

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