Education is one of the fields that
generate heaps of data. Pile of data that can utilized
by higher education institutions to improve tertiary
performance. One way to process data piles in the
education is to use data mining or called education
data mining. The quality assessment of educational
institutions conducted by the community and the
government is strongly influenced by student
performance. Students who have poor performance
will have a negative impact on educational
institutions. Student data is processed to obtain
valuable knowledge regarding the classification of
student performance. One method of data mining is
the C4.5 algorithm which is known to be able to
produce good classifications. In this research and
optimization method will be used namely optimize
selection on the c4.5 algorithm. Based on the
research, it is known that the optimization selection
optimization method can improve the performance
of algorithm c4.5 from 85% to 87%.
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