→ Diablotin:那B這個假設 怎麼解釋他不好阿？ 10/02 23:13
→ stephanini:被歸類成rich or poor還是必須那兩種uncount的人比例要 10/03 13:09
→ stephanini:一樣,不然不能剛好抵銷 10/03 13:10
說美國的census不夠完美,因為有很多人沒被算進來。However,這基本的藍圖是正確的。
有錢人出國旅遊的沒被算進來,窮人沒地方住的沒被算進來,如果這兩部份剛好比例一樣多,就可以抵銷了。
※ 引述《Diablotin (咕嚕咕嚕)》之銘言：
: 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.
: 答案C
: 想請問這題的假設思路是什麼？為什麼要補這個假設呢？
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