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P chart - Is the process out of control?

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A p-chart has been developed for a particular item. In the past, 3% of such items have been found to be defective. If a sample of 100 is taken, and 9 of these are found to be defective, should the process be considered out of control? Explain

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The expert examines if the process is out of control using a p-chart. A complete, neat and step-by-step solution is provided.

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p = 0.03, n = 100

Standard error, SE = sqrt[p(1 - p)/n] = sqrt[0.03(1 - 0.03)/100] = ...

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