Question: Cpk (Process capability index) = Min (USL-Mean/3xStandard deviation, Mean-LSL/3xStandard deviation) = Min (2.52-2.51/3x0.004, 2.51-2.48/3x0.004) = Min (0.83 , 2.5) Cpk = 0.83

Cpk (Process capability index) = Min (USL-Mean/3xStandard deviation, Mean-LSL/3xStandard deviation) = Min (2.52-2.51/3x0.004, 2.51-2.48/3x0.004) = Min (0.83 , 2.5) Cpk = 0.83

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