Standard Deviation

Inherent in the kriging process is the determination of the expected error or Standard Deviation at each estimated point. As we approach the location of our samples, the standard deviation will approach zero (0.0) since there should be no error or deviation at the measured locations.

The units of standard deviation are the same as the units of your estimated analyte.

The figure below shows why one standard deviation corresponds to 68% of the occurences, whereas three sigma (standard deviations) covers 99.7%

At a particular node in our grid, if we predict a concentration of 50 mg/kg and have a standard deviation of 7 mg/kg , then we can say that we have a ~68% confidence that the actual value will fall between 43 and 57 mg/kg.

The computation of the expected Minimum and Maximum estimates for a given Confidence level is what our Min/Max Estimate provides.