If a point is more than 3 sigmas away from the centerline, or if two out of three consecutive points are on the same side of the centerline and more than 2 sigmas away from it, the process is deemed to be in control.

Question

True
False

Answer 1

Both situations would involve relatively extreme variation from the norm (mean). Does that seem like being "in control"?

I hope this helps. Thanks for asking.