When sample points are hugging the center line of a control chart,it usually indicates that the sample data is drawn from two populations.

Question

Quizplus · Accepted Answer

When sample points are hugging the center line of a control chart, it usually indicates that the process is under control and the variation is within acceptable limits. It does not necessarily indicate that the sample data is drawn from two populations.

When Sample Points Are Hugging the Center Line of a Control