Question: Can someone confirm the equation to solve this problem. I have tried these, but am told I have the incorrect answer: UCL = x +

Can someone confirm the equation to solve this problem. I have tried these, but am told I have the incorrect answer:

UCL = x + zx & LCL = x - zx

The postmaster of a small western town receives a certain number of complaints each day about mail delivery.

DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Number of complaints 4 12 15 8 9 6 5 13 14 7 6 4 2 10

a.Determine two-sigma control limits using the above data. (Round your intermediate calculations to 4 decimal places and final answers to 3 decimal places. Leave no cells blank - be certain to enter "0" wherever required. Round up any negative control limit value to zero.)

UCL

LCL

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