Unit
Notes - 2
4. What are
Westgard rules:
A multi-rule
system for identifying when there was out-of-control quality control
12S =
R4S =
2. Define what each of the following mean:
1 control
exceeds mean by >2 S.D. and is a warning
2 controls in
same run differ by 4 S.D.
22S =
1 controls
exceeds the mean by 2 S.D. in same direction two consecutive times or two controls in
same run