The interim report of the TSE-OSC mining standards task force refers to the additive property of variances, but the president of the CIM geological society, Marcel Vallee, objects to applied statistics and analysis of variance.
Perhaps he ought to explain how it is possible to develop a valid geostatistical model on the basis of widely spaced exploration data if closely spaced blasthole grades do not even display a statistically significant degree of spatial dependence, or how it is possible to calculate unbiased confidence limits for contents and grades of resources and reserves without using degrees of freedom. In fact, I offer $1,000 to the first geostatistician who can do so.
Jan Merks
President, Matrix Consultants
Coquitlam, B.C.
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