A package delivery service has the following late deliveries each day. DAY 1 2 3 4 5 6 7 8 9 10 11 1

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A package delivery service has the following late deliveries each day.

DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14   Number of late deliveries 4 12 16 8 9 6 5 12 15 7 6 4 2 11 a.

Determine three-sigma control limits using the above data. Hint: Since N is unknown, use a C chart. (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    b. Is the process in control?