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Analyzing a confidential data

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.

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Solution Preview :

Prepared by a verified Expert

Basic Statistics: Analyzing a confidential data

Reference No:- TGS0683409

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Recent Questions Asked Basic Statistics

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Solution Preview :

Prepared by a verified Expert

Basic Statistics: Analyzing a confidential data

Reference No:- TGS0683409

Recent Questions Asked Basic Statistics

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