Question: Statistical Quality (Process) Control Q1. Data-Entry clerks at ARCO key in thousands of insurance records cach day. Samples of the work of 20 clerks are

Statistical Quality (Process) Control Q1. Data-Entry clerks at ARCO key in thousands of insurance records cach day. Samples of the work of 20 clerks are shown in table. One hundered records entered by each clerk were carefully examined to make sure they contained no errors. Set the control limits to include 99.7% of the random variation in the entry process when it is in control. (Render and Hizer, 1997: 125). Sample Number of Sample Number of Number Errors Number Errors 11 s 12 6 6 0 1 4 6 4 13 14 15 16 17 18 19 20 3 9 10

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