Question: Please help with the following question: Using four samples of 200 credit card statements each, an auditor found the following number of erroneous statements in

Please help with the following question: Using four samples of 200 credit card statements each, an auditor found the following number of erroneous statements in each sample: Sample 1 2 3 4 number of errors 4 2 5 9 Under a three-sigma control limits, choose the suitable control chart to judge whether or not the process is in control.

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