One problem with mail questionnaires is that they typically cost more than telephone interviews.

Name: One problem with mail questionnaires is that they typically cost more than telephone interviews.
Brand: Quizplus
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Quizplus · Accepted Answer

Mail questionnaires typically cost less than telephone interviews because there is no need for a researcher to call and conduct the interview. However, mailing and collecting the questionnaires may take more time and effort.

One Problem with Mail Questionnaires Is That They Typically Cost