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Predicted values in gestatictical methods or Root-Mean-Square Error

Question asked by geonetadmin on Feb 10, 2014
Latest reply on Feb 11, 2014 by nicholina
Original User: Nicholina

Hello, i need yr help very much!
I try to use Geostatistical Analist with Local Polynomial Interpolation method.

When i put parameters to model, click Next, and i get window with table of measured, predicted and error values (first picture), i click finish and get model.

After i click on my Local Polynomial Interpolation layer and pick "Validation/Prediction", i get new layer with points, i open its table (picture second) and get the same measured values (which i used for interpolation), new predicted values (that r soooo different from that which r on first picture!!!).

Can some one explaine me, because of what is so big difference in predicted values?

I worry because i have so big Root-Mean-Square Error on first picture, and so small and good after counting data (alone, without using arcgis) on second picture.

I will be glad to hear any yr suggestions and variets! Thank you!