Problem:
Customer satisfaction. A department store mails a customer satisfaction survey to people who make credit card purchases at the store. This month, 45,000 people made credit card purchases. Surveys are mailed to 1000 of these people, chosen at random, and 137 people return the survey form.
Required:
(i) What is the population of interest for this survey?
(ii) What is the sample? From what group is information actually obtained?