請問: GWD26-Q22

[Claire.D]

People who have spent a lot of time in contact with animals often develop animal-induced allergies, some of them quite serious. In a survey of current employees in major zoos, about 30 percent had animal-induced allergies.
Based on this sample, experts conclude that among members of the general population who have spent a similarly large amount of time in close contact with animals, the percentage with animal-induced allergies is not 30 percent but substantially more.

Which of the following, if true, provides the strongest grounds for the experts’conclusion?
A. A zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.
B. A zoo employee is more likely than a person in the general population to keep one or more animal pets at home
C. The percentage of the general population whose level of exposure to animals matches that of a zoo employee is quite small.
D. Exposure to domestic pets is, on the whole, less likely to cause animal-induced allergy than exposure to many of the animals kept in zoos.
E. Zoo employees seldom wear protective gear when they handle animals in their care.

答案A

不過實在是不懂他的邏輯
可以請高手解釋一下嗎??
謝謝

[A級垂耳兔]

動物園員工對動物過敏比率30%
同樣時間接觸動物的一般大眾卻高於30%(看到這句就想知道位什麼)

答案A...原來有部分受不了過敏的動物園員工轉行...代表動物園員工產生過敏的比率目前是相對低的...

舉例如下:
假設接觸動物30小時會產生過敏的人...每十一人有四人
動物園員工(接觸動物均達30小時)假設十一人....四人有過敏症狀
一般大眾有接觸動物30小時的人假設也是十一人....四人有過敏症狀

動物園員工一人離職後變成一般大眾...比率產生變化...
動物園員工變成十人...三人過敏
一般大眾接觸動物30小時變成十二人.....五人過敏...

達到原題推論一般大眾同樣時間接觸動物但過敏比率較高.....[/url][/list][/list][/code][/quote][/u][/i]

[pucka0613]

C選項不太確定他的意思...
是說一般民眾接觸動物的比率相對小嗎??

[阿琪]

恩~沒錯！

一般民眾接觸動物的百分比相對比動物園員工的百分比小相當多~~(無法支持本題)

[julanlu808]

E不能support嗎? 我的思路是...

E說zoo employees很少穿帶防護措施當他們在照顧動物的時候

又general population當然更不可能有這樣的防護措施

不就support the conclusion that the percentage of general population with allergies is higher than 30%?

請問我哪裡想錯了~謝謝~

[Huang Hsin-Yi]

E不能support嗎? 我的思路是...

E說zoo employees很少穿帶防護措施當他們在照顧動物的時候
又general population當然更不可能有這樣的防護措施
同樣缺乏防護+同樣相處的時間=同樣過敏的機率
因此E選項為中立資訊

如果,選項改成,動物園員工大部份都有防護措施,就可推出你的邏輯

不就support the conclusion that the percentage of general population with allergies is higher than 30%?

請問我哪裡想錯了~謝謝~

[julanlu808]

真的是.......當頭棒喝!!

多謝H大提醒!