A marketing research firm wishes to determine if the residents of Caldwell, Idaho, would be interested in a new downtown restaurant. The firm selects a simple random sample of 120 phone numbers from the Caldwell phone book and calls each household. Only 62 of those called are willing to participate in the survey, and 56 participants would support a new downtown restaurant.
(a) The population of interest is
A. all households in the Caldwell phone book.
B. the 62 households that participated in the study.
C. the 120 phone numbers chosen.
D. all residents of Caldwell.
E. None of the above.
(b) The sample in this survey is
A. the 120 phone numbers chosen.
B. all residents of Caldwell.
C. all households in the Caldwell phone book.
D. the 62 households that participated in the study.
E. None of the above.
(c) The chance that all 120 phone numbers chosen are located in one particular neighborhood in Caldwell is
A. 120 divided by the size of the population of Caldwell.
B. exactly 0. Simple random sampling will spread out the locations of the phone numbers selected.
C. reasonably large due to the ''cluster'' effect.
D. the same as for any other set of 120 phone numbers.
E. None of the above.
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