Sample means and ranges for the car wash process

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At Quickie Car? Wash, the wash process is advertised to take less than 66 minutes.? Consequently, management has set a target average of 340 seconds for the wash process. Suppose the average range for a sample of 10 cars is 11 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.

Reference no: EM131232975

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