AS 2806.6-1994

1 - AS 2806.6-1994 ALUMINIUM ORES-SAMPLING - METHODS FOR CHEKCING THE BIAS OF SAMPLING
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE
5 - 2 REFERENCED DOCUMENTS
5 - 3 GENERAL REQUIREMENTS
6 - 4 SAMPLING AND SAMPLE PREPARATION METHODS
6 - 4.1 Sampling
6 - 4.2 Sample preparation
6 - 5 ANALYSIS OF EXPERIMENTAL DATA
6 - 5.1 Determination of the standard deviation of the differences
7 - 5.2 Determination of the required number of data sets, n, for experiment
7 - 5.3 Statistical test
9 - APPENDIX A - NUMERICAL EXAMPLES OF DETERMINING THE BIAS OF SAMPLING

Specifies experimental methods for checking the bias in sampling and sample preparation of aluminium ores. Allows an analysis of differences in results obtained at loading and discharge.

This Standard specifies experimental methods for checking the bias of the sampling of aluminium ores, where the sampling is carried out in accordance with the methods specified in AS 2806.1. These methods may also be applied for checking the bias of sample preparation, where the sample preparation is carried out in accordance with the methods specified in AS 2806.3. These methods for analysing experimental data may alsobe applied for checking a possible significant difference in the result obtained from the samples of one lot collected at different places, for example, a loading point and a discharging point.NOTE: Numerical examples of calculations are given in Appendix A.

First published as AS 2806.6-1994.