“…Usually, when using regression, one tries to predict the dependent variables' values using independent attributes of different types. The number of independent variables is very large and includes age and gender [4,5], GPA grades [6], educational level of parents [7], emotional and social factors [8], and even the complexity measure of teachers' lecture notes [9]. Dependent variables include course grade [5,6,10,11], exam grade [8,12] and even aptitude in computer programming [13].…”