“…The methods are implemented by several algorithms, and several were used in the selected papers. The most widely used Decision Tree algorithm is C4.5 [Zorrilla and Garcia-Saiz 2014], [Romero et al 2013a], [Hu et al 2014], followed by Simple Cart [Zorrilla and Garcia-Saiz 2014], [Romero et al 2013a], [Hu et al 2014], and Random Trees [Romero et al 2008], [Romero et al 2013a], [Hu et al 2014 [Romero et al 2013a]. Other popular algorithms are: K-means clustering [Moradi et al 2014], [Jovanovic et al 2012], [Pardos et al 2012], [Mogus et al 2012], [Sorour et al 2014]; K-nearest neighbor (KNN) [Zorrilla and Garcia-Saiz 2014], [Kotsiantis et al 2010], [Minaei-Bidgoli et al 2003], [Gamulin et al 2016]; and JRip [Zorrilla and Garcia-Saiz 2014], [Márquez-Vera et al 2013].…”