You want to develop a three-sigma R-chart. You know the average range is 5 based on several samples 1 answer below »

You want to develop a three-sigma R-chart. You know the average range is 5 based on several samples of size 10. D4 = 1.78. Which of the following is the resulting UCL? A.

3.1 B.

7.02 C.

20.9 D.

8.9 E.

5

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