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A call centre uses a control chart to monitor the daily number of customer complaints. For a time period of 10 days, the numbers are

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A call centre uses a control chart to monitor the daily number of customer complaints. For a time period of 10 days, the numbers are recorded in the following table. Based on this data, is the process in control if we use the confidence level 90%? Note: You need to decide which control chart to use

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