Question: To study process B, the quality engineer collected 25 subgroups of 6 observations and determined the following control limits for the Xbar-R chart: X bar

To study process B, the quality engineer collected 25 subgroups of 6 observations and determined the following control limits for the Xbar-R chart: X bar chart: UCL=16.18; LCL=13.52 R chart: UCL= 7.10

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