PAPTAC - Z.2P

ACCURACY AND PRECISION OF STANDARD METHODS

active, Most Current
Organization: PAPTAC
Publication Date: 1 November 1981
Status: active
Page Count: 3
scope:

In general, the random variations affecting test methods are normally distributed (i.e., give a Gaussian frequency distribution curve) and therefore the computations are based on this distribution. In case of non-normal distributions consult reference 2 or 3. Random variations are those which arise from small and unavoidable errors in such operations as weighing, reading instruments, etc., and which over a number of replicate measurements, tend to average out to zero. They are not to be confused with systematic error or bias - as typified by improper calibration of apparatus - which does not reduce precision but decreases accuracy. Bias is the most dangerous form of error and special care must be taken to avoid it when devising sampling schemes.

Document History

Z.2P
November 1, 1981
ACCURACY AND PRECISION OF STANDARD METHODS
In general, the random variations affecting test methods are normally distributed (i.e., give a Gaussian frequency distribution curve) and therefore the computations are based on this distribution....
November 1, 1981
Accuracy and Precision of Standard Methods
A description is not available for this item.
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