Question: A point that plots below the lower control limit on the range chart: Select one: a.is due to a shift in the process mean b.should

A point that plots below the lower control limit on the range chart: Select one:

a.is due to a shift in the process mean

b.should be investigated for random variation. c.should be ignored because lower variation is desirable. d.may be an indication that process variation has decreased e.is not possible

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