A magazine published a questionnaire for its readers to fill out and mail to the magazine’s office.
In the questionnaire, cell phone owners were asked how much they would have to be paid to do without their cell phones for one month. The magazine received responses from 5439 cell phone owners.
a. Based on the discussion of types of samples in Section A.2.2, what type of sample is this? Explain.
b. To what kind(s) of systematic error, if any, would this survey be subject?