3.57 Importance of students as customers. A committee on community relations in a college town plans to survey local businesses about the importance of students as customers. From telephone book listings, the committee chooses 80 businesses at random. Of these, 46 return the questionnaire mailed by the committee.
(a)What is the population for this sample survey?
(b)What is the sample?
(c)What is the rate (percent) of nonresponse?