Since the presence of a point outside control limits for
Chapter 25, Problem 25.5(choose chapter or problem)
Since the presence of a point outside control limits for the mean indicates trouble ("the process is out of contro]"), how often would we be making the mistake oflooking for nonexistent trouble if we used (a) I-sigma limits. (b) 2-sigma limits? (Assume normality.)
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer