One of the earliest known datasets used for evaluating classification methods. 4 databases: Cleveland, Hungary, Switzerland, and the VA Long Beach Two datasets are included, related to red and white vinho verde wine samples, from the north of Portugal. The goal is to model wine quality based on physicochemical tests. Predict whether annual income of an individual exceeds $50K/yr based on census data. Diagnostic Wisconsin Breast Cancer Database. The data is related with direct marketing campaigns (phone calls) of a Portuguese banking institution. The classification goal is to predict if the client will subscribe a term deposit. Predict student performance in secondary education (high school). This is a transactional data set which contains all the transactions occurring between 01/12/2010 and 09/12/2011 for a UK-based and registered non-store online retail. Derived from simple hierarchical decision model, this database may be useful for testing constructive induction and structure discovery methods.