1. Concrete Slump Test: Concrete is a highly complex material. The slump flow of concrete is not only determined by the water content, but that is also influenced by other concrete ingredients.
2. Fertility: 100 volunteers provide a semen sample analyzed according to the WHO 2010 criteria. Sperm concentration are related to socio-demographic data, environmental factors, health status, and life habits
3. Forest Fires: This is a difficult regression task, where the aim is to predict the burned area of forest fires, in the northeast region of Portugal, by using meteorological and other data (see details at: http://www.dsi.uminho.pt/~pcortez/forestfires).
4. Housing: Taken from StatLib library
5. Automobile: From 1985 Ward's Automotive Yearbook
6. Student Performance: Predict student performance in secondary education (high school).
7. Breast Cancer Wisconsin (Prognostic): Prognostic Wisconsin Breast Cancer Database
8. Tennis Major Tournament Match Statistics: This is a collection of 8 files containing the match statistics for both women and men at the four major tennis tournaments of the year 2013. Each file has 42 columns and a minimum of 76 rows.
9. wiki4HE: Survey of faculty members from two Spanish universities on teaching uses of Wikipedia