Establishing p-chart for control

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Reference no: EM1399923

Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table:

Number of Number of
Defective Items Defective Items
Sample n in the Sample Sample n in the Sample

1 15 3 6 15 2
2 15 1 7 15 0
3 15 0 8 15 3
4 15 0 9 15 1
5 15 0 10 15 0

a. Develop a p-chart for 95 percent confidence (1.96 standard deviation).
b. Based on the plotted data points, what comments can you make?

Reference no: EM1399923

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