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Calculation of UCL and LCL

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The Early Morning Delivery Service guarantees delivery of small packages by 10:30 A.M. Of course, some of the packages are not delivered by 10:30 A.M. For a sample of 200 packages delivered each of the last 15 working days, the following number of packages were delivered after the deadline: 12, 12, 4, 11, 12, 3, 13, 5, 5, 3, 2, 4, 6, 7, and 6.

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The solution provides the calculation of UCL and LCL.

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