逻辑 Critical Reasoning-6920

标记
People who have spent a lot of time in contact with animals often develop animal-induced allergies, a significant percentage of which are quite serious. In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. However, a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.

Which of the following hypotheses receives the strongest support from the information given?

【选项】Among members of the general population who have spent as much time with animals as zoo employees typically have, the percentage with animal-induced allergies is significantly more than 30 percent.

选项是否正确?

  • 正确
  • 错误

正确的用户笔记

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raymondilmlibra 2014-12-29 15:32:55

题目称最近一项动物园员工调查显示,有近30%的人患有动物过敏症。然而,患有严重动物过敏症的动物园员工很有可能已经离职了。那么表明,在该员工没有离职前,动物园员工的过敏人数比例远比30%要高,是因为严重患者走了,所以才降到30%这个数。而选项称,在普通人中那些和动物相处时间和动物园员工一样长的人群,他们患有动物过敏的几率明显大于30%。这就解释了为什么人群中接触动物时间和动物园员工一样长,但是动物园员工有过敏的比例要低于普通人的原因,是因为严重过敏的动物园员工已经转到其他工作中去,成为“普通人”之一。

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