Question: Studies on a machine that molds plastic water pipe indicate that when it is injecting 25.31 mm diameter pipe, the process standard deviation is 0.75

Studies on a machine that molds plastic water pipe indicate that when it is injecting 25.31 mm diameter pipe, the process standard deviation is 0.75 mm. The pipe has a specification of 25.31 mm plus or minus 2.45 mm. What is the process capability index (Cp)? 1.089 O a. Ob 2.178 Oc 3.267 Od 0.5444
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