Question: Studies on a machine that molds plastic water pipe indicate that when it is injecting 25 mm diameter pipe, the process standard deviation is 0.25

Studies on a machine that molds plastic water pipe indicate that when it is injecting 25 mm diameter pipe, the process standard deviation is 0.25 mm. The pipe has a specification of 25mm mm plus or minus 1.0 m.Wht is the process capability index (Cp)?

a. 0.50

b. 0.67

c. 1.00

d. 1.33

e. 1.50

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