Question: 6. A manufacturing process is monitored using x-bar and R charts. Ten samples of n=8 observations have been gathered with the following results. Using this

6. A manufacturing process is monitored using x-bar and R charts. Ten samples of n=8 observations have been gathered with the following results. Using this data to establish control charts, what is the upper control limit for the R chart?

Sample Mean Range

1 33.79. 7.162

2 27.27 7.751

3 33.03 6.572

4. 27.48 5.526

5 21.57 6.13

6 25.05 8.213

7 32.18 8.308

8 26.91 7.142

9 25.43 7.734

10. 29.75 7.906

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