A recent report determined that although only three percent of driverson Maryland highways equipped their vehicles with radar detectors, thirty-threepercent of all vehicles ticketed for exceeding the speed limit were equippedwith them. Clearly, drivers who equip their vehicles with radar detectors aremore likely to exceed the speed limit regularly than are drivers who do not.
The conclusion drawn above depends on which of the followingassumptions?
(a) Drivers who equip theirvehicles with radar detectors are less likely to be ticketed for exceeding thespeed limit than are drivers who do not.
(b) Drivers who are ticketedfor exceeding the speed limit are more likely to exceed the speed limitregularly than are drivers who are not ticketed.
(c) The number of vehiclesthat were ticketed for exceeding the speed limit was greater than the number ofvehicles that were equipped with radar detectors.
(d) Many of the vehicles thatwere ticketed for exceeding the speed limit were ticketed more than once in thetime period covered by the report. (B)
(e) Drivers on Marylandhighways exceeded the speed limit more often than did drivers on other statehighways not covered in the report. | 
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发表于 2011-11-10 18:33:36
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