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?
(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.
答案B 我选了A
我看了各大论坛的解释，越看越晕！ 哪位大侠帮忙解释解释！ 谢谢！！作者: Jeffrey-N 时间: 2013-4-26 19:32
楼主最好用柱状图 我不太好给你画， 一个方形，中间一条线得到两个柱子，一个是ticketers，一个不是， 然后再画横线穿ticketers柱子，代表exceed（任意画）， 然后再画大约33%分割线做equiped，由于条件中说了drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly are drivers who do not. 所以两个柱子应该是t的那个分割线柱子大，所以b 不知道楼主看明白了吗作者: mingmings 时间: 2013-4-28 06:18
