Hired-Hand Evolution Series Bird Scale Manual - Manual (Page 19)

Part n° 890-00487 rev.00 Evolution Bird Scale Controller 19
Standard Deviation
Average Weight
X 100
Variation
Coefficient
(CV)
=
7-day Average: This is the average weight of the birds of the
past 7 weighing days (see weighing schedule
section). Note that this value is only available
for breeders and it is only displayed after
7 weighing days.
Standard deviation: The standard deviation represents how spread
apart the weights are. For instance, a standard
deviation of 20 grams means that most birds
(68%) weigh +/- 20 grams from the average
weight. This also means that 95% of the birds
weigh +/- 40 grams from the average weight
(2 times the standard deviation). In other words,
the lower the standard deviation is, the more
uniform the flock is.
Variation
Coefficient (CV): Shows the standard deviation as a percentage
of the average.
Uniformity: This value shows the percentage of uniform
birds in the flock. The uniformity is determined
by the uniformity bandwidth. Refer to section
5.7.5.1.
Weighing Today: This value tells the number of weighings that
have been logged today by the selected scale.
Note that this value is calculated on weighing
days only (see weighing schedule section).