(3 points) (a) An opinion poll contacts 1369 adults and asks them, \" Which poli

Question

(3 points) (a) An opinion poll contacts 1369 adults and asks them, " Which political party do you think has better ideas for leading the country in the 21st century?" In all, 564 of the 1369 say, " The Democrats." The sample in this setting is oA. all 235 million adults in the United States. B. the 564 people who chose the Democrats. C. the 1369 people interviewed. D. None of the above (b) A sample of households in a community is selected at random from the telephone directory. In this community, 5% of households have no telephone, 18% have only cell phones, and another 25% have unlisted telephone numbers. The sample will certainly suffer from A. undercoverage. B. nonresponse. C. false responses. D. None of the above. (c) 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 239 businesses at random. Of these, 72 return the questionnaire mailed by the committee. The population for this study is A. the 72 businesses that returned the questionnaire. B. the 239 businesses chosen. C. all businesses in the college town. D. None of the above.

Explanation / Answer

a)C the sample is only the people who are intereviewed which in this case is 1369

b) since only 18% have telephone , we can suffer from undercoverage A)

c) population is C

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