The specification for the diameters of ball bearings is 15.4015.60 mm. Data from an X chart, based
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The specification for the diameters of ball bearings is 15.40–15.60 mm. Data from an X̅ chart, based on samples of size 8, that shows that the process is in control, yield values of X̅ = 15.52 and R̅ = 0.05.
a. Compute the value of Cpk for this process.
b. Is the process capability acceptable? Explain.
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