ISO-6139 › Aluminium ores -- Experimental determination of the heterogeneity of distribution of a lot
ISO-6139
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1ST EDITION
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CURRENT
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The heterogeneity of distribution is characterized by the distribution variance and is determined by experimentally measuring the sampling variance. Because both the composition variance and distribution variance contribute to the measured sampling variance, it is necessary to separate these two components. Two methods of data analysis are permitted: Visman's theory of sampling which uses classical statistics and the variogram method which gives a better estimate because of taking into account serial correlation between adjacent increments.
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Document Number
ISO 6139:1993
Revision Level
1ST EDITION
Status
Current
Publication Date
Aug. 1, 1993
Committee Number
ISO TC 129