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The R2 and root mean square error (RMSE) values for different distribution functions.
| Functions | Equation | R2 | R2adj | RMSE |
|---|---|---|---|---|
| Linear Function | Predicted = 1.197 + 0.649 lgCr | 0.649 | 0.648 | 0.320 |
| Exponential Function | Predicted = 1.162 + 0.659 lgCr | 0.656 | 0.655 | 0.320 |
| Binomial Distribution Function | Predicted = 0.878 + 0.743 lgCr | 0.743 | 0.742 | 0.293 |
Chromium concentration in soil was lg-transformed to ensure homogeneity of variances.
