A VARIANCE-RATIO TEST FOR SUPPORTING A VARIABLE MEAN IN KRIGING

This article discusses the issue of whether to use a variable mean and describes a test that can be used to evaluate whether it is justified to add terms to the drift (deterministic parr) of a geostatistical mo del. The basic model could be the intrinsic one, where the determinist ic part is a constant, and the alternate model could be any model that includes a constant term in the expression for the drift. Also, diffe rences between constant- and variable-mean models are discussed.