Determines the sample mean outer diameter to be 1.002, Ask an Expert

Statistics

1. A metal fabricator produces connecting rods with an outer diameter that has a 1 +/- 0.01 inch specification. A machine operator takes several sample measurements over time and determines the sample mean outer diameter to be 1.002 inches with a standard deviation of 0.003 inch.

a. Calculate the process capability index for this example.
b. What does this figure tell you about the process?

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