Question: Studies on a machine that molds plastic water pipe indicate that when it is injecting 27.69 mm diameter pipe, the process standard deviation is 0.73
Studies on a machine that molds plastic water pipe indicate that when it is injecting 27.69 mm diameter pipe, the process standard deviation is 0.73 mm. The pipe has a specification of 27.69 mm plus or minus 1.46 mm. What is the process capability index (Cp)?
a. 0.6667
b. 2
c. 1.333
d. 0.3333
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