Question: A total of 3 0 samples, sample size is 7 5 items for each of them, have been collected from a process. A total of

A total of 30 samples, sample size is 75 items for each of them, have been collected from a process.
A total of 53 defective items were found in the entire 30 samples. Calculate
(a)3-sigma control limits and center line for a p chart,
(b)3-sigma control limits and center line for an np chart.
 A total of 30 samples, sample size is 75 items for

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