When no point lies outside the control limits of a chart, we conclude that:

Question

A) variation in the process is caused by assignable causes and there is enough evidence to infer that the process is in statistical control.

B) variation in the process is caused by chance and there is enough evidence to infer that the process is out of control.

C) variation in the process is caused by chance and there is not enough evidence to infer that the process is out of control.

D) variation in the process is caused by assignable causes and there is not enough evidence to infer that the process is out of control.