For process control charts,to approximately capture 99% of the random variation,the control limits will need to correspond to how many standard deviations from the mean?
A)z = 1
B)z = 2
C)z = 3
D)z = 4

Question

Quizplus · Accepted Answer

In process control charts, control limits set at 3 standard deviations from the mean (z = 3) are used to capture approximately 99.73% of the random variation, assuming a normal distribution.

For Process Control Charts,to Approximately Capture 99% of the Random