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Let Xi represents individual measurement of some quality characteristic and Xi follow the normal distribution with = 10. It is observed that about 95% of

Let Xi represents individual measurement of some quality characteristic and Xi follow the normal distribution with = 10. It is observed that about 95% of Xi fall between interval [8, 12]. Samples (n=5) are taken hourly. Establish the center line, upper control limit (UCL) and lower control limit (LCL) of the chart for monitoring this process based on the methods proposed by Dr. Shewhart

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