2. Coefficient of Variation (CV)
Coefficient of Variation (CV) –
A measurement of imprecision
(random error), biologic variation, or other
variability in a clinical parameters, population;
mathematically.
3. CV%
Measure of Relative Variation
Always a %
Shows Variation Relative to Mean
Used to Compare 2 or More Groups
Allowable %= 5%
4. CV% Calculation
The Coefficient of Variation [CV] is the ratio of the standard
deviation to the mean and is expressed as a percentage.
CV=SD/MEAN
Other names:
VIS - CMC
Z-Score – Bio Rad
5. Z-Score?
Z-Score is a statistical measurement of a
score's relationship to the mean in a group of
scores. (Peer group, methodology,
instrument)
