Standard: PAPTAC - Z.2P
ACCURACY AND PRECISION OF STANDARD METHODS
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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.
|Organization:||Pulp and Paper Technical Association of Canada, Formerly CPPA|
|Change Type:||COMPLETE REVISION|
|Most Recent Revision:||YES|
|Document #||Change Type||Update Date||Revision||Status|
|Z.2P||Change Type: STCH||Update Date: 1981-11-01||Status: INAC|
This Standard References
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