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Five-fold cross-validation estimate of the gamma ordinal association measure between the observed and predicted ordinal response for the low birthweight dataset.
| Ordinal impurity | 0.446 |
| Ordered twoing | 0.436 |
| Generalized Gini with linear cost of misclassification | 0.345 |
| Generalized Gini with quadratic cost of misclassification | 0.402 |
