Question: A manager wants to build 2 -sigma x-bar control limits for a process. The target value for the mean of the process is 10 units,

A manager wants to build 2 -sigma x-bar control limits for

A manager wants to build 2 -sigma x-bar control limits for a process. The target value for the mean of the process is 10 units, and the standard deviation of the process is 3 . If samples of size 9 are to be taken, what will be the upper and lower control limits, respectively? 14 and 6 15 and 5 9 and 11 12 and 8 4 and 16

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