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1000 CR - TEST B #19

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sky828i Junior | Next Rank: 30 Posts Default Avatar
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1000 CR - TEST B #19

Post Fri Aug 24, 2007 11:38 am
19.The U.S. census is not perfect: thousands of Americans probably go uncounted. However, the basic statistical portrait of the nation painted by the census is accurate. Certainly some of the poor go uncounted, particularly the homeless; but some of the rich go uncounted as well, because they are often abroad or traveling between one residence and another.
Which of the following is an assumption on which the argument above depends?
(A) Both the rich and the poor have personal and economic reasons to avoid being counted by the census.
(B) All Americans may reasonably be classified as either poor or rich.
(C) The percentage of poor Americans uncounted by the census is close to the percentage of rich Americans uncounted.
(D) The number of homeless Americans is approximately equal to the number of rich Americans.
(E) The primary purpose of the census is to analyze the economic status of the American population.


how com the answer is 'c'?
can anyone explain?

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kajcha Master | Next Rank: 500 Posts Default Avatar
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Post Thu Aug 30, 2007 10:45 am
Agree with beny.. ANS is C

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beny Master | Next Rank: 500 Posts Default Avatar
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Post Fri Aug 24, 2007 12:15 pm
sky828i wrote:
19.The U.S. census is not perfect: thousands of Americans probably go uncounted. However, the basic statistical portrait of the nation painted by the census is accurate. Certainly some of the poor go uncounted, particularly the homeless; but some of the rich go uncounted as well, because they are often abroad or traveling between one residence and another.
Which of the following is an assumption on which the argument above depends?
(A) Both the rich and the poor have personal and economic reasons to avoid being counted by the census.
(B) All Americans may reasonably be classified as either poor or rich.
(C) The percentage of poor Americans uncounted by the census is close to the percentage of rich Americans uncounted.
(D) The number of homeless Americans is approximately equal to the number of rich Americans.
(E) The primary purpose of the census is to analyze the economic status of the American population.

how com the answer is 'c'?
can anyone explain?
The conclusion is in bold. It only holds under assumption C. If the percentages of uncounted people of different classes were not relatively equal, the statistical portrait would not be accurate.

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