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If the p=0.2313 for a np chart, and the number of items in a sample are 50, what will be the center line value of the np chart?

If the p=0.2313 for a np chart, and the number of items in a sample are 50, what will be the center line value of the np chart? Correct Answer 11.56

The center line of the np chart represents the value equal to, CL=np Here, n=50 and p=0.2313, putting these values in the CL value, we get, CL=11.565.

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