In 12 samples of size it 7 the average value of the sample


Question: In 12 samples of size it = 7, the average value of the sample means is = 6.860 in for the dimension of interest, and the mean of the ranges of the samples is = 0.027 in. Deter-mine:

(a) LCL and UCL for the chart and

(b) LCL and UCL for the R chart.

(c) What is your best estimate of the standard deviation of the process?

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Management Theories: In 12 samples of size it 7 the average value of the sample
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