[求助]OG-88

tyou · 发表于 2003-9-21 06:27:00

in tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. to use the laboratory test that has the lowest proportion of false positive results.

E/ all laboratory tests to detect pironoma have the same proportion of false negative results.

Why E makes sense. have read explanation, did not understand yet.

fyhllj · 发表于 2003-9-22 06:08:00

我在读完此题时，意识到要use the laboratory test that has the lowest proportion of false positive results.必须保证他的a false negative result 不必别的test 要多。否则，他不应成为最佳选择。

但是当我读到e项中的all laboratory时，很自然的将其排除（because of all) and then narrow down b and c But I cannot find a better answer between them. At last I chose c. the result is that i am wrong. If I can read through the e option. I must choose it. So I got a hint that never ignore any options because there is no must right nor must wrong.

eyda_c · 发表于 2005-11-3 21:30:00

http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=90184&page=1

版主,请把题目改成87

[求助]OG-88

[求助]OG-88

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