本贴相关题目 OG-2015-CR-77 | GMATPrep-2007E2-CR-40OG-2015-CR-77 |
OG-13-CR-77 |
OG-12-CR-78 |
GMATPrep-2007E2-CR-40
... (KLMT)

00:00:00

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?

ADrivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.
BDrivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.
CThe number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehicles that were equipped with radar detectors.
DMany of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.
EDrivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.

正确答案: B

11thog--81题提问（黄皮）

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amanda2078 amanda2078 当前离线 UID 107744 在线时间小时注册时间 2005-8-18 最后登录 1970-1-1 主题帖子性别保密	楼主发表于 2006-10-14 21:07:00 \| 只看该作者提示: 作者被禁止或删除内容自动屏蔽

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allfar

沙发

发表于 2006-10-14 21:44:00 | 只看该作者

(1)3%的车装探测器.A1

(2)被罚的超速车中33%装探测器.A2

结论装探测器的比不装的更倾向于超速.B

问必要条件:

使前因后果能连接起来.

被罚的人比不被罚的人更愿意超速.

A1的比率小于A2.推出被罚的车中多数人装探测器.从这个中间结论和结论之间的关系就能寻找到必要条件了.

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amanda2078 amanda2078 当前离线 UID 107744 在线时间小时注册时间 2005-8-18 最后登录 1970-1-1 主题帖子性别保密	板凳楼主\| 发表于 2006-10-15 23:39:00 \| 只看该作者提示: 作者被禁止或删除内容自动屏蔽

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