Question 2.

A process is used to vaccinate a large number of people. The key variable here is the time taken to vaccinate one person. The process is monitored using control charts for variables.

The process is in control if:

A. Range chart indicates process is in control

B. Mean chart indicates process is in control

C. Both mean chart and range chart indicate the process is in control

D. Either mean chart or range chart indicate process is in control

Question 3

All of the following indicate a process that is not in control, EXCEPT:

A. Too many consecutive points close to a control limit

B. Too many consecutive points all above the center line

C. A random scatter of points between the two control limits

D. A series of points showing an upward or downward trend