Question

At Liberty High School, researchers passed out surveys at lunch about drug use and asked students to turn them in on their way out. They might not get accurate results because:

Answer 1

The researchers might not get accurate results because:
1. some students might not return the survey.
2. The number of students who came for lunch might not be representative of the students' population.
3. The sampling was not done randomly.

Answer 2

The researchers might not get accurate results because of the following points:

1) The students may lie about the drug use.
2) The students may write correct information and might later feel guilty of writing the truth.
3) High school Students dont know much about drug types and its usage.
4) This task must be conducted in person, with students.