Standard: PAPTAC - Z.2P

ACCURACY AND PRECISION OF STANDARD METHODS

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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.

Organization: Pulp and Paper Technical Association of Canada, Formerly CPPA
Document Number: z.2p
Publish Date: 1981-11-01
Page Count: 3
Change Type: COMPLETE REVISION
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: YES
Status: Active

Document History

Document # Change Type Update Date Revision Status
Z.2P Change Type: STCH Update Date: 1981-11-01 Status: INAC

This Standard References

Showing 2 of 2.

ASTM STP 335

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