It can be seen that these accuracies are comparable with those achieved on the dataset
with university related data only. Apparently, the pre-university data does not add much
independent information that can improve classification accuracy. However, we can see
that the trees learnt with J48 are now statistically significantly better than the base line
model. The other tree-based classifiers also achieve reasonable accuracy, while the
Bayes Net and JRip algorithms slightly fall behind.