Question: The average time it takes for a housekeeping staffto clean a room at the JW Marriott is 15 mins, with a standard deviation of 1

The average time it takes for a housekeeping staffto clean a room at the JW Marriott is 15 mins, with a standard deviation of 1 min. Process specification limits dictate that a person should not take more than 20 mins or less than 12 mins to clean a room.

Calculate the process capability index of the cleaning process.

A. 1.66

B. 1

C. 1.33

D. 2

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