Krispy Kreme is considering building a franchise in a particular city. It will use a survey to determine the extent of interest among residents of the city. Which of the following procedures would be most appropriate for obtaining a statistically unbiased sample?
A. Survey a selection of people who are listed on the residential roll sheets of the city.
B. Survey a random selection of customers coming out of other donut shops in the city.
C. Survey a selection of people whose names are randomly chosen from the telephone directory of the target city.
D. Survey a random selection of people whose names are obtained from national sales records of Krispy Kreme customers.
E. none of the above procedures would be most appropriate.
Answer: A
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