请教prep2-40

lvhaomin

16楼。。牛

Vivian1091

Feature A= equipped with radar detector or not  ;  Feature B = have been ticketed or not
Given that: Among those who don't have A, 3% have B;   Among those who have A, 33% have B.[ We can see that those with feature A tend to have feature B]
Premise: those with feature B are more likely to do sth than those without feature B
Conclusion: those with feature A are more likely to do sth than those without feature A
Analysis: Because feature A and feature B tend to positively related, it is easy to conclude that those with feature A tend to have feature B and those with feature B tend to have feature A.

不知道对不对

MissUindeed

B项直接取非，非常快得到答案

bbmaker

这个题完全没问题啊，被罚的车主更爱超速（即assumption）+有电子狗的车主被罚的概率又极高（33%/3%比67%/97%）可以推出文中结论：有电子狗的车主更爱超速（ Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.），注意是用结论推assumption哦

Victoriagirl

speed713 发表于 2007-9-18 21:45
A recent report determined that although only three percent of drivers on Maryland highways equipped ...

我想说太牛了，佩服的五体投地！茅塞顿开

OwenBBB

其实还是不明白，原文的premise不是说了“ticketed for exceeding"吗？那为什么还要补这个gap？

yaoaha

注意结论中的regularly！这个才是重点！

villalon

受益匪浅啊 ，终于明白了。

cw1015

条件A： 装了radar detectors的 更有可能 被开罚单（因为超速）
条件B(也就是选项B）：被开罚单（因为超速）的 更有可能 经常超速
结论： 装了radar detector的 更容易 经常超速
哈自己理一遍~

huizhuba

条件A+装了雷达的被罚款比率高——————》装雷达的更容易超速

问A

自然就只有选项，被罚款的都是超速几率大的

这种题要倒推吧。。。

或者不用推，一个说雷达罚款，一个说雷达超速，要联系起来，只有罚款+超速。。。就只有这个选项，这样应该是考试中最快的