20. 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 pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of false positive results.
Which of the following, if true, gives the most support to the recommendation above?
(A) The accepted treatment for pironoma does not have damaging side effects.
(B) The laboratory test that has the lowest proportion of false positive results causes the same minor side effects as do the other laboratory tests used to detect pironoma.
(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 tests used to detect pironoma.
(E) All laboratory tests to detect pironoma have the same proportion of false negative results.
看了OG的解释还是不明白.
偶总是觉得, 这个题目没有说明. 给的答案是E. 那么就是说所有的FALSE NEGATIVE结果一样, 但是没有说比FALSE POSITIVE 的结果比例高或者低. 这个是个常常的错啊!!!!!
另外, 上面很多条件没有用到. 偶选的是A. A这个其实是个ASSUMPTION啊...取非的话, 结论就完全不成立了!!!!如果the accepted treatment for P does have damaging side effects 的话, 那么一定是宁愿错过一千个有病的, 不能误诊一个啊...
解释里面说A, C是无关选项...极度郁闷!!!! |