5 In order to find out what happens when different sampling rates are used, we continued using the imbalanced data sets of the previous section, but rather than simply oversampling and undersampling them by equalizing the size of the positive and the negative set, we oversampled and undersampled them at different rates.
we divided the difference between the size of the positive and negative training sets by 10 and used this value as an increment in our oversampling and undersampling experiments.