As shown in Figure 7, there is a correlation between disciplines and grades. Now, it is possible toprocure other correlations that allow the explanations for these results. For example, when a studentscores high in some discipline, is it expected that he or she also gets high grades in some other set ofdisciplines? If so, can this common wisdom be verified?Figure 8 shows that there is low correlation between absenteeism and some specific discipline.Thus, one cannot state that absentees in some discipline affects others.