Question: The specification for a plastic handle calls for a length of 6.0 inches 0.3 inches (5.7 to 6.3 inches). The process is known to operate

The specification for a plastic handle calls for a length of 6.0 inches 0.3 inches (5.7 to 6.3 inches). The process is known to operate at a mean thickness of 5.9 inches. The minimum acceptable process capability is 4-sigma (1.33). The standard deviation () of the process is currently 0.06 inches.

The specification limits have not changed. Suppose that the mean of the process is still 5.95 inches with a standard deviation () of 0.06. What is the range (upper and lower limits) on the mean of the process to maintain a Cpk of 1.33 or greater?

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