0 = male
1 = female

country of birth
1 = Australia
2 = elsewhere

Participation in sport
1 = rarely or never
2 = once a fortnight
3 = once a week
4 = more than weekly

enrolment status
1 = fulltime
2 = parttime
3 = single subj

Firstborn?
1 = yes
2 = no

Past smoker?
0 = no
1 = yes

marital status
1 = never married
2 = married
3 = separated
4 = divorced
5 = widowed

Expected performance in statistics
1 = fail
2 = just pass
3 = pass comfortably
4 = credit or above
5 = don't know

Employment Status
1 = paid employment
2 = no paid employment