Question: Studies on a machine that molds plastic water pipe indicate that when it is injecting 26.64 mm diameter pipe, the process standard deviation is 0.4
Studies on a machine that molds plastic water pipe indicate that when it is injecting 26.64 mm diameter pipe, the process standard deviation is 0.4 mm. The pipe has a specification of 26.64 mm plus or minus 1.75 mm. What is the process capability index (Cp)?
a.
1.458
b.
4.375
c.
2.917
d.
0.7292
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