1. A major concern with many panels is: a) their lack of sensitivity to marketing mix changes b) a potential lack of representativeness c) a lack of demographic data d) their "after the fact" nature e) none of the above
2. In general, the least amount of time is required to complete a total survey when ________ are used. a) mail interviews b) telephone interviews c) personal interviews d) all of the above e) none of the above