Studies on a Machine That Molds Plastic Water Pipe Indicate

question 87

Multiple Choice

Studies on a machine that molds plastic water pipe indicate that when it is injecting 1-inch-diameter pipe, the process standard deviation is 0.05 inches. The 1-inch pipe has a specification of 1 inch plus or minus 0.10 inch. What is the process capability index ( C_pk) if the long-run process mean is 1 inch?

• A)0.50
• B)0.67
• C)1.00
• D)2.00
• E)2.20

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Definitions:

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