Question: A process, when in control, produces a normally distributed output with a mean X-bar of 100 and a mean range of R-bar of 16. When

A process, when in control, produces a normally distributed output with a mean X-bar of 100 and a mean range of R-bar of 16. When using samples of size 20 and 3 Standard Deviation control limits, then which of the following is the upper control limit of the R chart? Group of answer choices

25.38

24.08

20.00

16.00

29.74

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