Question: A process when in control produces a normally distributed output with a mean of ( x double bar ) 2 0 0 and a mean

A process when in control produces a normally distributed output with a mean of (x double bar)200 and a mean range of (R bar)20.10 samples of 20 each yield the following means and ranges. When using samples of size 20 and 2 Standard Deviation control limits, then which of the following is the upper control limit of the x bar chart?

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