Siemens Rapidlab 1200 Operator's Manual page 140

4-10
The mean value is defined as the sum of all results divided by the number of results,
according to the following formula:
x
• SD(R), standard deviation with RiliBÄK range checking defined according to the
following formula:
RMSD
• SD(R) as a percentage, standard deviation as a percentage with range checking
defined according to the following formula:
RMSD
• SD(
formula:
S
• CV, coefficient of variation is defined according to the following formula:
CV
• N, number of samples included for these statistics.
NOTE:
15 samples are analyzed, the field is blank. For Standard Deviation and Coefficient of
Variation, a minimum of 5 samples is required. If fewer than 5 samples are analyzed,
the field is blank.
NOTE:
sample you suspect is out of range, see Using the QC List Screen‚ page 4-7.
NOTE:
RiliBÄK 2008 requirements that define deviation from target ranges.
NOTE:
02087462 Rev. V
+ +
1 x x
N L
= Σ =
x 1 2
i
N N
=
i 1
1 n
∑
= − 2
( x x )
i t arg et
n
=
i 1
=
% ( RMSD / x
t
x
), standard deviation against the mean is defined according to the following
1
N
= Σ − 2
( x x )
i
−
( N ) 1
=
i 1
S
= ×
100 %
x
For RMSD and RMSD%, a minimum of 15 samples is required. If fewer than
If a sample is out of range it may skew QC Analysis results. To exclude a
Low and high AQC and RQC ranges are adjusted to adhere to the
CO-ox fractions for FO
Rapidlab 1200 Operator's Guide: Quality Control
+
x
N
* ) 100
arg et
Hb, F , FMetHb, and FHHB are not adjus
COHb
2
ted.