Calculations for nominal volume V
N
x
i
= results of weighings
n = number of weighings
Z = correction factor
(e. g., 1.0029 µl/mg at 20 °C, 1013 hPa)
Mean value
Mean volume
Accuracy
Coefficient of variation
Standard deviation
V = x · Z
100 s
V
CV% =
Σ
(x
i
– x)
2
n – 1
s = Z ·
V – V
N
V
N
A% = · 100
33
x =
Σ
x
i
n