If a sample of items is taken and the mean of the sample is outside the control limits the process is
A) out of control and the cause should be established
B) in control, but not capable of producing within the established control limits
C) within the established control limits with only natural causes of variation
D) monitored closely to see if the next sample mean will also fall outside the control limits
E) producing high quality products

Question

Quizplus · Accepted Answer

If the mean of the sample falls outside the control limits, it indicates that there is a special or assignable cause of variation present in the process, and it is out of control. The cause of the variation needs to be identified and eliminated to bring the process back to a state of statistical control.

If a Sample of Items Is Taken and the Mean