标题: 求教OG上面那道超速罚款和雷达关系的逻辑题，想了半个小时都没想通。。 [打印本页] 作者: William沛 时间: 2014-2-10 17:27 标题: 求教OG上面那道超速罚款和雷达关系的逻辑题，想了半个小时都没想通。。 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.
这个题我是完全不知道是什么个逻辑关系，答案是B，我怎么觉得B和题目中的结论是一样的？？作者: houhaibo528 时间: 2014-2-10 20:16
我是这么因为的，如果“超速”一事按照样本平均值来分析，由题目的内容，Maryland vehicles 3% equip with radar, 那么应该有3%的超速被罚事件equip with radar.但是事实却是33%超速被罚事件with radar.因此，得出pre-conclusion， drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit than are drivers who do not.
这个pre-conclusion和conclusion之间有一个jumpover,即副词regularly
B make up for the jumpover.
个人看法 作者: francoisyang 时间: 2014-2-11 13:22
原文的fact是3%的车装反雷达，33%因超速被罚款的车装了反雷达；conclusion是装了反雷达的车更可能超速。
B与原文最后一句话的区别就在于把超速和罚款联系起来。
请注意，超速被罚和超速，不是一回事。作者: elusive 时间: 2016-9-12 15:30
因为：在马里兰，被抓住超速的和安装雷达的成正比
结论：所有的驾驶员，那些安装雷达的比没有安装的更regularily 超速。
简化：
前提：安装雷达=被抓住
结论：安装雷达=经常超速
