Question: The postmaster of a small western town receives a certain number of complaints each day about mail delivery. Determine three- sigma control limits using the

The postmaster of a small western town receives a certain number of complaints each day about mail delivery. Determine three- sigma control limits using the following data. Is the process incontrol?

DAY 1 2 3 4 5 6 7 8 9 10 1 12 13 14 Number of complaints 4 10 14 89 6 512 13 76 4 2 10

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