Question: The output of a process has a normal distribution with an average of 100 per day and a standard deviation of 8. Your monitor plan

The output of a process has a normal distribution with an average of 100 per day and a standard deviation of 8. Your monitor plan takes samples of size 16 once every day. The sample means for the last 4 days. They are 103, 105, 98, and 107. Is the process under control? Why? And what will you do?

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