Table 2 Optimal feature set selected by three feature selection techniques.
Optimal feature set – Portuguese dataset | Optimal feature set – mathematics dataset | ||
|---|---|---|---|
Methods | Optimal features | Methods | Optimal features |
Chi-square | Medu, Fedu, Mjob, Fjob, failures, Dalc, Walc, absences, G1, G2. | Chi-square | Romantic, Schoolsup, Mjob, Fjob, failures, Dalc, Walc, absences, G1, G2. |
Information gain | Age, Medu, Fedu, freetime, internet, romantic, Fjob, Mjob, gout, Dalc, Walc, health, absences, G1, G2. | Information gain | sex, age, Medu, Fedu, freetime, internet, studytime, Fjob, Mjob, gout, Dalc, Walc, absences, G1, G2. |
Correlation heat map | G2, G1, failures, studytime, Dalc, address, higher, Fedu, Medu, Walc, Fjob, Mjob. | Correlation heat map | G2, G1, failures, traveltime, goout, age, higher, Fedu, Medu, romantic, Fjob, Mjob. |
