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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. --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------请问A 哪里不对呢？ 如果装radar detectors的车更不容易被开罚单，而被开罚单的中却有33%都是装radar的，那不就说明了装radar 的 平时 更爱超速（所以才在不容易被罚、数量少的情况下还占了被罚车辆的很大比例）吗？
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发表于 2016-4-7 19:52:08
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