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A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

正确答案: B

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无语了。。。每次做都不明白,求解释 prep cr2 40

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楼主
发表于 2012-3-10 15:42:11 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
A recent report determined that although only three percent of drivers on Maryland highways equipped their vehicles with radar detectors, thirty-three percent of all vehicles ticketed for exceeding the speed limit were equipped with them.  Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.
(B) Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.
(C) The number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehicles that were equipped with radar detectors.
(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.
(E) Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.


麻烦大家帮我解释一下,越详细越好,每次做都只是大概明白了,下次做又不理解,极度无语!
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沙发
发表于 2012-3-10 18:02:41 | 只看该作者
Whenuworkonthisquestion,ushouldthispointclearthatnotallthedriversspeedingwillbecatchesforticketing,whileinourcommonsensedriversspeedingwillbedefinitelycatches.
Justgiveupyourcommonsense.
板凳
 楼主| 发表于 2012-3-11 08:05:10 | 只看该作者
我还是不太明白

能不能把逻辑分析过程讲述一下呢?谢谢了~
地板
 楼主| 发表于 2012-3-11 08:08:05 | 只看该作者
5#
 楼主| 发表于 2012-3-11 08:27:38 | 只看该作者
好像想明白了
只有3%的人装了雷达探测器,但是有33%的人装了并被罚
说明,装了的人更容易被罚
搭桥:被罚的人更容易超速
所以:装了的人更容易超速
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