标题: 求助各位前辈一道题目OG13 77 [打印本页] 作者: yingying_0729 时间: 2014-6-20 17:12 标题: 求助各位前辈一道题目OG13 77 77. 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.
不是太理解这个assumption的意思。作者: finalcloud 时间: 2014-6-22 20:16
超速而吃罚单的比没有吃罚单的更容易 超速 意思就是说一超速就有罚单，这样才确定了没有漏网之鱼，那么统计数据才能说明问题。作者: brfmzbjz 时间: 2014-6-28 15:20
本版有过很多讨论
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