Advantages to this: Cheap, reach a large cross section of people in a short period of time, don't have to worry about the interviewer affecting the sample.

Advantages to this: Cheap, reach a large cross section of people in a short period of time, don't have to worry about the interviewer affecting the sample.

Advantages to this: Cheap, reach a large cross section of people in a short period of time, don't have to worry about the interviewer affecting the sample.






a. Self-Administration
b. Questionnaires
c. Interviews









Answer: A