Question: A point that plots below the lower control limit on the range chart: Select one: O a. should be investigated for random variation. O b.

A point that plots below the lower control limit
A point that plots below the lower control limit on the range chart: Select one: O a. should be investigated for random variation. O b. should be ignored because lower variation is desirable. O c. may be an indication that process variation has decreased Od. is due to a shift in the process mean

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