OG 11th No.112

[eiswein]

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 detect pironoman most accurately, physicians should use the laboratory test that has the lowest proportion of false positive results.

(A) The accepted treatment for pironoman does not have damagin side effects.

(B) The laboratory test that has the lowest proportion of false positive results causes the same minor side effects ad do the other laboratory tests used to detect prionoma.

(C) In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.

(D) The proportion of inconclusive test results is equal for all laboratory test used to detect pironoma.

(E) All laboratory tests to detect pironoma have the same propotion of false negative results.

ANS:E

這題我在看過OG後面的解釋後，好像有那麼一點點了解，可是又不是很清楚。為什麼選E就可以代表檢測機率的正確性提高呢？
不知道有沒有人可以幫忙解釋一下嗎？THX~

[StanleyHuang]

題目說，測試結果可能有 false positive 或是 false negative。然後就說要準的話，就得要用 false positive 比例低的。

從這裏就可以想說，明明false positive 與flase negative都會造成影響，那為何只要考慮flase positive低的就好？什麼原因可以讓我們不用去考慮 flase negative的case？

這樣應該就容易了解了吧 ~~