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?
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.
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.
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.
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.
Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.
不对吧,感觉不用算数啊,前提说33%安装雷达的被罚了,结论说安装雷达的更容易超速,那不就是少了个gap(被罚的一定是经常超速的)因为被罚也有可能是偶尔超速被发现了。。数字是不是迷惑的部分啊。。。。
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