Calculate process capability index

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A metal fabricator produces shot gun barrels with an outer diameter that has a 2.5 ± 0.05 inch specification. A machine operator takes several sample measurements over time and determines the sample mean outer diameter to be 2.53 inches with a standard deviation of 0.030 inch.

Calculate the process capability index (Round your answer to 4 decimals.

Reference no: EM131483564

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