In SPC, the distribution of sample means
A) can be approximated by the normal distribution.
B) will have greater variability than the process distribution.
C) cannot be used for control charts because the variability is understated.
D) will always have a mean greater than the process distribution because of the sample size.

Question

Quizplus · Accepted Answer

The distribution of sample means can be approximated by the normal distribution due to the Central Limit Theorem, which states that the sampling distribution of the sample mean will tend to be normal, regardless of the shape of the process distribution, as the sample size becomes large.

In SPC, the Distribution of Sample Means