Question: 12. A process when in control produces a normally distributed output with a mean of 200 and a mean range of 20. When using samples

12. A process when in control produces a normally
12. A process when in control produces a normally distributed output with a mean of 200 and a mean range of 20. When using samples of size 6, then which of the following is the upper control limit of the R chart? A) 38.5 B) 40 C) 26 D) 34.3 E) 37.3

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