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ISO 13909:2016
ISO 13909:2016 Hard coal and coke – Mechanical sampling – Part 7: Methods for determining the precision of sampling, sample preparation and testing
CDN $312.00
Description
In ISO 13909-7:2016, formulae are developed which link the variables that contribute to overall sampling precision. Methods are described for estimating overall precision and for deriving values for primary increment variance which can be used to modify the sampling scheme to change the precision. Methods for checking the variance of sample preparation and testing are also described.
Edition
2
Published Date
2016-06-23
Status
PUBLISHED
Pages
43
Language
English
Format
Secure PDF
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Abstract
In ISO 13909-7:2016, formulae are developed which link the variables that contribute to overall sampling precision. Methods are described for estimating overall precision and for deriving values for primary increment variance which can be used to modify the sampling scheme to change the precision. Methods for checking the variance of sample preparation and testing are also described.
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