The depth interview: a) causes severe problems in analysis b) requires highly skilled interviewers c) lacks structure d) all of the above e) none of the above

Select the question that can be answered through experimentation: a) Do children from upper classes drink more carbonated beverages than those from lower classes? b) Will Shell gasoline with platformate provide better mileage than Shell without platformate? c) Does the average male use cosmetic? d) Is the standard of living higher than ten years ago? e) none of the questions can be answered by experimentation