Question: In a process control, UCL and LCL for X Chart have been calculated as 4 6 . 0 5 5 and 5 3 . 9

In a process control, UCL and LCL for X Chart have been calculated as 46.055 and 53.945,respectively, where the sample size is 14.a) Estimate the population mean and population variance. (15)b) Can we conclude that the process is under control? (5)

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