A researcher decides to give a questionnaire on television watching behaviors to every student in a large freshman college orientation course in her university. What sampling method is she using?...

A researcher decides to give a questionnaire on television watching behaviors to every student in a large freshman college orientation course in her university. What sampling method is she using?

What’s wrong with this scenario? An experimenter is interested in better understanding why some people love fast food and some do not. He stands in the fast-food isle of the market and asks buyers their opinion.