I have two geostatistical models from geoR. An ordinary kriging model with AIC=-148.6 and a universal kriging model with AIC=-156.7, there are 345 data points. The improvement shown by the AIC by adding a trend component to the model seems quite small given the number of data points, is there a test to see if the improvement to the model fit is significant?
Thanks David
************************************************ David Pleydell D 31 Peel Building Telford Institute of Environmental Systems School of Environment and Life Sciences University of Salford M5 4WT phone: +44 161 2952094 fax: +44 161 295 5015
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