Evaluation and sampling 1. Confusion matrix. Accuracy, error rate, weighted error. Precision, recall, F1 measure. 2. Evaluation measures for a regression task 3. How to build a test set. N-fold cross validation. 4. Comparing different settings of classifiers. Learning curve, ROC curve. 5. Comparing different classifiers. Parametric t-test and non-parametric Wilcoxon test. 6. Sampling. Bootstrapping. Undersampling and oversampling