In general control limits are set at + or - ________ standard deviations which provides ________ probability limits.
A) 3, .05
B) 3, .001
C) 2, .05
D) 2, .01
E) 1, .34

Question

Quizplus · Accepted Answer

Control limits are typically set at ±3 standard deviations, which corresponds to a probability of about 0.001, meaning that there is a 0.1% chance of a point falling outside the limits due to random variation.

In General Control Limits Are Set at + or -