Measuring the number of unsatisfied delivery customers

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A local newspaper has been measuring the number of unsatisfied delivery customers for the past few weeks utilizing a survey. Below is a table with the number of unsatisfied customers for the past 4 weeks. Using a confidence interval of two standard deviations, construct the appropriate upper and lower control limits for the control chart(s). Step by step how to do?

Reference no: EM131119197

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