single tree, seed 0: test AUC 0.669
single tree, seed 1: test AUC 0.680
single tree, seed 2: test AUC 0.669
forest of   1 trees : test AUC 0.677
forest of  10 trees : test AUC 0.747
forest of 100 trees : test AUC 0.747
forest of 300 trees : test AUC 0.747
boosting,  10 rounds: test AUC 0.737
boosting,  50 rounds: test AUC 0.740
boosting, 100 rounds: test AUC 0.739
boosting, 300 rounds: test AUC 0.725
