Basic naive Bayes classifier baseline
As per the rules of the challenge, the participants had to outperform the basic naive Bayes classifier to qualify for prizes, which makes an assumption that features are independent (refer to Chapter 1, Applied Machine Learning Quick Start).
The KDD Cup organizers run the vanilla naive Bayes classifier, without any feature selection or hyperparameter adjustments. For the large dataset, the overall scores of the naive Bayes on the test set were as follows:
- Churn problem: AUC = 0.6468
- Appetency problem: AUC = 0.6453
- Upselling problem: AUC=0.7211
Note that the baseline results are reported for large dataset only. Moreover, while both training and test datasets are provided at the KDD Cup site, the actual true labels ...