极其纠结！OG-78

winny莹 · 发表于 2010-6-2 21:35:17

这是一道假设题，答案解释非常纠结，我要崩溃了！
A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar deterctors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehciles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion draw above depends on which of the following assumption?

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 exceeding the speed limit more often than did drivers on other state highways not covered in the report.
答案：B

题目说的是不是，有3%的司机给机动车安上了雷达检测器，然而有33%的超速车辆是有安装雷达检测器的，得出结论，安装雷达检测器的反而比没安装的更容易超速。
答案B说的是收到超速罚单的司机比没收到罚单的司机更容易经常超速。

天啊，有什么关联啊！这个题目涉及了几个变量，有没有安装雷达，会不会超速，有没有收到罚单，很乱啊，该怎么处理？

10gmat · 发表于 2010-6-2 23:42:56

逻辑题的中关于assumption的问题解决最关键的是看evidence 和conclusion中出现的名词之间的联系，这个联系就恰好是assumption应该提及的东西。
从这道题来看，前一个句子提及了ticketed for exceeding the speed limit 和equipped with radar,结论说了vehciles with radar detectors 和exceed the speed limit ，那么这个assumption就应该是说ticketed for exceeding the speed limit 和exceed the speed limit的关系了，于是就是B

从意思上看，被ticket的司机肯定不是只exceed the speed limit 一次就被罚款，应该是他经常超速，才导致被ticket

holacraig · 发表于 2010-6-3 13:30:40

我觉得这道题目的重点应该是在“Regularly”上。

wangjing726 · 发表于 2010-6-3 14:24:37

此题XDF的老师讲过……是很复杂的一段解释~

wangjing726 · 发表于 2010-6-3 14:25:56

这题的前提是：装雷达是因为经常超速~那个雷达是用来提示开车的人前方有测速区的东西~相当于电子狗~

winny莹 · 发表于 2010-6-3 16:48:14

太感谢了，好像清晰了很多！！！！

winny莹 · 发表于 2010-6-3 16:57:18

是啊，是啊，超复杂的解释，我当时都没来得及记笔记啊！请问有笔记吗？

winny莹 · 发表于 2010-6-3 16:58:33

强悍啊！我觉得对，其实逻辑很简单，经常超速的人怕超速才要用雷达检测器！

SAGA5 · 发表于 2010-7-28 21:19:02

我整理一下（用元素ABC表示） A是装雷达 B是被罚 C是超速 MORE LIKELY就是方向

题目条件得出：A到B （A装雷达易B被罚）
只有当：B到C ( B被罚者易C超速)--正确答案
才可以得出结论：A到C （A装雷达易C超速

winny莹 · 发表于 2010-7-29 14:56:22

顶！赞！

极其纠结！OG-78

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