Question: In an existing process, we have found that the lower and upper control limits for X-bar chart are 8.08 and 8.58 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 8.08 and 8.58 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: 8.05, 9.14.8.28, and 9.25. Using X-bar chart information only, what we can conclude about the process mean O a. Process mean is in-control O b. Insufficient information to conclude O c. Overall process is in-control O d. Process mean is out-of-control

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