A drilling process has an upper specification of $1\mathrm{.}964$ millimeters and a lower specification of $1\mathrm{.}777$ millimeters. A sample of parts had a mean of $1\mathrm{.}87$ millimeters with a standard deviaiton of $0\mathrm{.}026$ millimeters.

$1\mathrm{.}78$ points

Round your answer to four decimal places.

What is the process capability index for this system?

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