lsat17-3-23

sammen

23. A medical journal used a questionnaire survey to determine whether a particular change in its format would increase its readership. Sixty-two percent of those who returned the questionnaire supported that change. On the basis of this outcome, the decision was made to introduce the new format.

Which one of the following, if it were determined to be true, would provide the best evidence that the journal's decision will have the desired effect?

(A) Of the readers who received questionnires, 90 percent returned them.

(B) Other journals have based format changes on survey results.

(C) The percentage of surveyed readers who like the format change was almost the same as the percentage of the entire potential readership who would like format change.

(D) It was determined that the new format would be less costly than the old format.

(E) Ninety percent of the readers who were dissatisfied with the old format and only 50 percent of the readers who like the old format returned their questionnaires.

这个题目答案没问题，我是想问一下response率和survey的结果在什么情况下会有联系，我记得GMAT作文里有一题argument有类似的回复率和结果的问题讲的是飞机场的旅客投诉的问题，说是投诉的人少就是满意（忽略了不投诉的别的原因），这和本题有相似点吗？请NN给讲讲。

mygoalusa

你讲的GMAT作文题我不清楚.这好象是一道典型的RESPONSE和SURVEY结果比较的题目.当我在读提干的时候,我就想,那些回复SURVEY的人会不会大多数是支持FORMAT CHANGE的呢?因为不支持CHANGE的人,也就是对现在FORMAT没有意见的人,可能就懒得回复SURVEY了.那么如果答案中可以讲到支持和不支持FORMAT CHANGE的回复人数差不多,那么这个SURVEY的结果就比较公正了.我感觉C和E中有一个应该是对的.但是,很明显E对题目起到了削弱的作用,如果90%支持CHANGE的人和50%不支持CHANGE的回复,那么SURVEY的结果显然BIASED.C讲同意CHANGE的人占回复总人数的百分率相等于同意CHANGE的人占读者总人数的百分率,变相说明,大多数同意或不同意CHANGE的人都回复了,SURVEY结果有代表性,所以C可能是答案.

sammen

谢谢，答复，我明白了。