Question: A drilling process has an upper specification of 1 . 3 6 4 inches and a lower specification of 1 . 2 9 6 inches.

A drilling process has an upper specification of 1.364 inches and a lower specification of 1.296 inches. A sample of parts had a mean of 1.35 inches with a standard deviaiton of 0.028 inches.
What is the process capability index for this system?

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