19 RPBS-1 PORTABLE SCALE 2.0
Coefficient of Variation
The CV value is obtained by expressing the standard deviation as a
percentage of the average weight. This value describes the variation among
the recorded body weights in a single value.
The coefficient of variation (CV) percentage is calculated by the following
formula:
Uniformity (Homogeneity or Evenness)
The Uniformity value is obtained by counting birds with body weight, within
a range of either ±10% or ±15% of the average body weight. The number of
birds in this range is expressed as a percentage of the total number of
weights. In Europe most managers use the ±10% range but the fact that
different ranges are used does sometimes cause confusion. This method of
describing a variation is easy to practice but it does not accurately account
for all variations the way that CV does.
The formula for Uniformity is calculated by the following formula:
number of birds within ±10% of average
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