ECOTEST DoseG Operating Manual page 128

3.2.4.3.9 Calculate a confidence limit
of the main relative permissible error by
the following formula:
where
t = 2,26 -
dence probability
a relative root-mean-square deviation of
S -
the measurement result calculated by the
formula:

 t 
S
is Student's coefficient at confi-
P = 0,95 and
126
,
n
= 10;
(3.2)