NORMSERVIS s.r.o.

ISO 6139:1993

Aluminium ores — Experimental determination of the heterogeneity of distribution of a lot

NORMA vydána dne 5.8.1993

Anglicky -
Elektronické PDF (2060.40 CZK)
Anglicky -
Tištěné (2060.40 CZK)


Francouzsky -
Elektronické PDF (2060.40 CZK)
Francouzsky -
Tištěné (2060.40 CZK)

The information about the standard:

Designation standards: ISO 6139:1993
Publication date standards: 5.8.1993
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: International technical standard
Kategorie: Technické normy ISO

Annotation of standard text ISO 6139:1993 :

Description / Abstract: 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: Vismans 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.