Question: Studies on a machine that molds plastic water pipe indicate that when it is injecting 26.63 mm diameter pipe, the process standard deviation is 0.39
Studies on a machine that molds plastic water pipe indicate that when it is injecting 26.63 mm diameter pipe, the process standard deviation is 0.39 mm. The pipe has a specification of 26.63 mm plus or minus 2.52 mm. What is the process capability index (Cp)?
a. 2.154
b. 4.308
c. 6.462
d. 1.077
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