student gender
1 = male
2 = female

GPA in high school
1 = D
2 = C
3 = B
4 = A

admitted to university of choice
0 = no
1 = yes
9 = missing/not applicable

having a (part-time) job
0 = no job
1 = 1 hour
2 = 2 hours
3 = 3 hours
4 = 4 or more hours