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?