Error variance information from paired data; applications to sampling theory
Error variance information from paired data; applications to sampling theory (in Quality assurance, continuous quality improvement and standards in mineral resource estimation, Marcel A. Vallee (editor) and Alastair J. Sinclair (editor))
Exploration and Mining Geology (April 1998) 7 (1-2): 161-165
A method to extract certain types of error variance information from paired data is presented, which constitutes an important tool for the calibration of Gy's formula for variance predictions in the sampling of broken ores. The research summarized here complements publications by others on geochemical precision. The model and method proposed for treating duplicate data provide a practical means of deriving separate estimates of the purely analytical and aliquot sampling variances, from a unique set of duplicate assays, and, hence, proposes a new avenue for estimating effective mineral grain size.