Question: Studies on a machine that moulds plastic water pipe indicate that when it is injecting 2 5 m m diameter pipe, the process standard deviation

Studies on a machine that moulds plastic water pipe indicate that when it is injecting 25mm diameter pipe, the process standard deviation is 0.52mm. The 25mm pipe has a specification of 25mm plus or minus 1.08mm. What is the process capability ratio (Cp)?(N.B.: Round to 2 decimal places)
Studies on a machine that moulds plastic water pipe indicate that

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