개인 특성으로 성별, 연령, 성적을 사용하였는데 성별은 남자인 경우 1, 여자인 경우 0으로 더미 변수로 처리하였다.
Gender, age, and grade were used as individual characteristics, and gender was treated as a dummy variable as 1 for males and 0 for females.