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A manager took samples of size n = 6 hourly from a process for 16 hours and determined the lower and upper control limits for
A manager took samples of size n = 6 hourly from a process for 16 hours and determined the lower and upper control limits for the corresponding x -chart as below: L C L = 65.6224 U C L = 72.5776 Table of Control Chart Constants Calculate the following mean values accurate to 1 decimal place: x = R =
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