Twenty samples of n = 200 were taken by an operator at a workstation in a production process. The number of defective items in each sample was recorded as follows.
Number Number
Sample of Defects Sample of Defects
1 12 11 16
2 18 12 15
3 10 13 13
4 15 14 16
5 16 15 18
6 19 16 17
7 17 17 18
8 12 18 20
9 11 19 21
10 14 20 22
Management wants to develop a p-chart using 3-sigma limits. What are the control limits?

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The Answer of Twenty samples of n = 200 were taken by an operator at a workstation in a production process. The number of defective items in each sample was recorded as follows.
Number Number
Sample of Defects Sample of Defects
1 12 11 16
2 18 12 15
3 10 13 13
4 15 14 16
5 16 15 18
6 19 16 17
7 17 17 18
8 12 18 20
9 11 19 21
10 14 20 22
Management wants to develop a p-chart using 3-sigma limits. What are the control limits?

Twenty Samples of N = 200 Were Taken by an Operator