All of the following except which are ways to collect useful marketing research information?

Question

Quizplus · Accepted Answer

Impulsively stopping persons on the street to inquire about their buying habits is not a reliable or professional way to collect marketing research information. All of the other options (sending questionnaires by mail, conducting telephone polls, conducting personal interviews, buying from commercial or governmental data sources) are valid and commonly used methods for gathering marketing research information.

All of the Following Except Which Are Ways to Collect