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A manager wants to build control limits that include 95.45% of the sample means. The average mean of the process is 10 units, and the standard deviation of the process is known and it is equal to 6. I...

A manager wants to build control limits that include 95.45% of the sample means. The average mean of the process is 10 units, and the standard deviation of the process is known and it is equal to 6. If 4 samples of 9 units are to be taken, what is the UCL and LCL of X- bar chart

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