Specify how the respondents should be approached in the store. Write out the exact introductory remarks that you would use. Should the interview be in the store, or should the questionnaire be...

Specify how the respondents should be approached in the store. Write out the exact introductory remarks that you would use. Should the interview be in the store, or should the questionnaire be self-administered at home and mailed in, or should some other strategy be employed? If a self-administered questionnaire is used, write an introduction to it. What could be done to encourage a high response rate?