Find the control limits for the sample mean


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Q: A unit of output is considered not defective if it's a) at least 130 cm long: but B) no more than 160 cm long. Suppose this process's standard deviation is 3.75 cm. For this process the control limits for the sample mean are:

UCL(x-bar) = 140
LCL(x-bar) = 142

How capable is this process?

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Basic Statistics: Find the control limits for the sample mean
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