Question: In which situation(s) would we conclude there has been a trend in the process mean? I. When all points are randomly distributed around the centerline.

In which situation(s) would we conclude there has been a trend in the process mean?

I. When all points are randomly distributed around the centerline.

II.When nine or more consecutive points fall on the same side of the centerline.

III. When six points in a row show a steady increase (or decrease).

III only

I and II

I and III

II only

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