不会！

Spencer125 · 发表于 2013-6-7 00:42:45

In a recent poll, 71% of respondents reported that they cast votes in the most recent national election. Voting records show, however, that only 60 of eligible voters actually voted in that election.
Which of the following pieces of evidence, if true, would provide the best explanation for the discrepancy?

(A) The margin of error for the survey was plus or minus five percentage points.
(B) Fifteen percent of the survey's respondents were living overseas at the time of the election.
(C) Prior research has shown that people who actually do vote are also more likely to respond to polls than those who do not vote.
(D) Some people who intend to vote are prevented from doing so by last- minute conflicts on election day or other complications.
(E) Polls about voting behavior typically have margins of error within plus or minus three percentage points.
答案C DE为何不对？

maestri · 发表于 2013-6-7 08:35:45

试讨论
D的话和题干不符吧，提干的人群是已经投票的，而不是intend to vote
E：题干中两者差距为11%，E说最大3%，解释不了这11%的误差的

Spencer125 · 发表于 2013-6-7 09:05:12

嗯，懂了。解释的很清楚，谢谢了~~~

[逻辑小分队] 不会！

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