Question: 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
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 7, 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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