(a) A sample of households in a community is selected at random from the telepho
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Question
(a) A sample of households in a community is selected at random from the telephone directory. In this community, 2% of households have no telephone, 15% have only cell phones, and another 28% have unlisted telephone numbers. The sample will certainly suffer from
A. nonresponse.
B. undercoverage.
C. false responses.
D. None of the above.
(b) 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 286 businesses at random. Of these, 67 return the questionnaire mailed by the committee. The population for this study is
A. all businesses in the college town.
B. the 286 businesses chosen.
C. the 67 businesses that returned the questionnaire.
D. None of the above.
(c) An opinion poll contacts 1636 adults and asks them, " Which political party do you think has better ideas for leading the country in the 21st century?" In all, 646 of the 1636 say, " The Democrats." The sample in this setting is
A. the 646 people who chose the Democrats.
B. all 235 million adults in the United States.
C. the 1636 people interviewed.
D. None of the above.
Explanation / Answer
Ans:
a)option B is correct(undercoverage)
b)all businesses in the college town.
Option A is correct.
c) the 1636 people interviewed.
Option C is correct.
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