In nine samples each of size n = 10, the grand mean of the

In nine samples each of size n = 10, the grand mean of the

In nine samples each of size n = 10, the grand mean of the samples is   = 100 for the characteristic of interest, and the mean of the ranges of the samples is   = 85. Determine: (a) LCL and UCL for the  chart and (b) LCL and UCL for the R chart. (c) Based on the data given, estimate the standard deviation of the process.
 

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