Figure 14 shows how grades and absenteeism values vary. As can be seen, grades vary from0–100 and present the mean around 60. The promotion grade is 60, and in this case, several students fail to be promoted. The absenteeism ranges from 0–80 with the mean around five. The results donot permit identifying if absenteeism interferes with the results. An important factor to note is that,above grade 60, students tend to show a similar behavior. It is possible to notice a similar behavior onabsenteeism, but in the opposite direction.