tion level in question should have been reached; the sample is thus
restricted to include only those between ages 19 and 21. In the Philippines,
most school children are at the secondary level between the ages of
13 and 16, while those who go to college typically enroll at or around
age 17. By the time they are 19, nearly all those who are going to complete
high school would have done so, while most of those who are going
to go to college would have begun.