Reference no: EM132848780

1) Beginning March 1 at 3:30, the investigator stands outside the entrance to North High and hands out questionnaires to passing students and asks that they and their parents return them.

2) Investigator asks North High's assistant principal to generate a random list of 200 student names and addresses. Each of these students and his or her parents are mailed a questionnaire.

3) The investigator asks the guidance counselor for the names of exactly fifty college-prep students, fifty general study students, fifty vocational educational students, and fifty other students of any kind.

4) The investigator asks North High's assistant principal to draw (randomly) fifty names from each class (freshman, sophomore, junior, and senior). Each of these students and his or her parents are mailed a questionnaire.