Page:NIOSH Manual of Analytical Methods - Chapter E.pdf/15

Table I:

Values of the Bias (B) and the Precision (SP_rT) Required to Obtain Designated Values of Accuracy (A) in Percentage Units.^[1]

A	B	Srt
(%)	(%)	(%)
5$	-3.5&	0.9450*
5$	-2.5&	1.5589*
5$	0.0&	2.5511*
5$	2.5&	1.4829*
5$	3.5&	0.8811*
10$	-7.5&	1.6432*
10$	-5.0&	3.1999*
10$	0.0&	5.1022*
10$	5.0&	2.8952*
10$	7.5&	1.4139*
15$	-10.0&	3.3777*
15$	-5.0&	6.3814*
15$	0.0&	7.6530*
15$	5.0&	5.7736*
15$	10.0&	2.7636*
20$	-10.0&	6.7554*
20$	-5.0&	9.4476*
20$	0.0&	10.2043*
20$	5.0&	8.5478*
20$	10.0&	5.5271*
25$	-10.0&	10.1284*
25$	-5.0&	12.3869*
25$	0.0&	12.7548*
25$	5.0&	11.2072*
25$	10.0&	8.2869*
30$	-15.0&	10.7287*
30$	-7.5&	14.5544*
30$	0.0&	15.3061*
30$	7.5&	12.5236*
30$	15.0&	7.9299*
35$	-15.0&	14.3038*
35$	-7.5&	17.5897*
35$	0.0&	17.8574*
35$	7.5&	15.1353*
35$	15.0&	10.5724*

* Below the minimum attainable precision with a 5% pump correction.

$ Does not fulfill the Accuracy Criterion (±25% of the true value).

& Does not fulfill the bias criterion (±10%).

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1. Note: the values shown in this table are population or theoretical values.