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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