Question: In an existing process, we have found that the lower and upper control limits for X-bar chart are 8.09 and 8.59 respectively. Whereas, the lower

In an existing process, we have found that the

In an existing process, we have found that the lower and upper control limits for X-bar chart are 8.09 and 8.59 respectively. Whereas, the lower and upper control limits for R-chart are 0 to 1.25 respectively. The following measurements for one sample are taken: 8.5, 9.14, 8.28, and 9.2. Using both the X-bar chart and R-chart for this particular sample, what we can conclude about the overall process O a. Process is out-of-control. O b. Perfect process Process is in-control OC. O d. Insufficient information to conclude

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