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The critical dimension on a machined hole must be 0.5025 in. The machining process can reliably...

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Mechanical Engineering

The critical dimension on a machined hole must be 0.5025 in. Themachining process can reliably create holes with a known standarddeviation of 0.005 in. A random sample of 15 holes has an averagediameter of 0.5062 in.

(a) With 97.5% confidence can you conclude that the mean holediameter is larger than 0.5025 in?

(b) At what confidence level would you change your conclusion?What is the term for the alpha value that is associated with thatvalue?

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