Validate, explore, clean and transpose data were the next activities
where irrelevant columns were deleted (e.g. group, remark,
individual activities points, registration number), translation from
Slovene to English (columns title and content) was implemented
and columns order were adjusted accordingly (logical order for
success prediction, the last column was set as the predictable attribute:
‘‘Final grade’’). For more transparent prediction the different
statuses were transformed (from several status lists to yes/no
value). To avoid personal data problems, the student names were
transformed into numbers.