The process mean and standard deviation can be estimated by using samples that are selected from the process when
A) it has only assignable-cause variation.
B) its output is uniformly distributed.
C) it is assumed to be operating in control.
D) it is operating at peak capacity.

Question

The process mean and standard deviation can be estimated by using samples that are selected from the process when​
A) ​it has only assignable-cause variation.
B) ​its output is uniformly distributed.
C) ​it is assumed to be operating in control.
D) ​it is operating at peak capacity.

Quizplus · Accepted Answer

The process mean and standard deviation can be estimated by using samples that are selected from the process when it is assumed to be operating in control. This is because when the process is in control, the variation present is only due to common causes, which helps in estimating the stable and consistent metrics of the process.

The Process Mean and Standard Deviation Can Be Estimated by Using