QUESTION $35$

Statistical process control charts:

A$.$ are a graphic way of classifying problems by their level of importance, often referred to as the $80-20$ rule.

B$.$ display the measurements on every item being produced.

C$.$ indicate to the operator the true quality of material leaving the process.

D$.$ indicate to the process operator the average outgoing quality of each lot.

E$.$ display upper and lower limits for process variables or attributes and signal when a process is no longer in control.

QUESTION $36$

Natural $($common or random$)$ variations:

A$.$ affect almost every production process.

B$.$ are the many sources of variation that occur when a process is under control.

C$.$ when grouped the sample means approximate a normal distribution.

D$.$ are accepted within limits$,$ when a process is under control.

E$.$ all of the above