A recent survey of all auto accident victims in Dole County found that, of the severely injured drivers and front-seat passengers, 80 percent were not wearing seat belts at the time of their accidents. This indicates that, by wearing seat belts, drivers and front-seat passengers can greatly reduce their risk of being severely injured if they are in an auto accident.
The conclusion above is not properly drawn unless which of the following is true?
(A) Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents.
I guess A is the answer.
Two surveys were conducted.
1. Auto accident victims survey
2. All the drivers and front-seat passengers survy
In the 1st survey 80 percent said that they were not wearing seat belts during accidents. That means only 20 percent were wearing seat belts. If we want to establish that wearing seat belts can greatly reduce their risk of being severely injured we need to show that more than 20 percent in general drivers and front seat passengers wear seat belts. Then only we can say that less usage of seat belt causes risk of severe injuries in accidents.
(B) Considerably more than 20 percent of drivers and front-seat passengers in Dole County always wear seat belts when traveling by car.
(C) More drivers and front-seat passengers in the survey than rear-seat passengers were very severely injured.
(D) More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.
(E) Most of the auto accidents reported to police in Dole County do not involve any serious injury.
I have got the answer to this by POE but havent understood the reason for the correct answer.Can anyone expalin...
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