Question: x-bar (mean chart) using table (Mean (x-bar) and Range (R) Chart Factors) Thirty samples of 18 cans each are measured from a canning process while

x-bar (mean chart) using table (Mean (x-bar) and Range (R) Chart Factors)

Thirty samples of 18 cans each are measured from a canning process while it is in control. The mean of the thirty sample means is 15.02 ounces and the average range is 0.14 ounces. What should the upper and lower control limits be on a mean chart to monitor this canning process in the future? Answer: UCL 15.05, LCL 14.99

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