[R] AIC and significance tests

[David Richard John Pleydell]

Hi
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



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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