Finding of a survey of Systems magazine subscribers: Thirty percent of all merchandise orders placed by subscribers in response to advertisements in the magazine last year were placed by subscribers under age thirty-five.
Finding of a survey of advertisers in Systems magazine: Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.
For both of the findings to be accurate, which of the following must be true?
(A) More subscribers to Systems who have never ordered merchandise in response to advertisements in the magazine are age thirty-five or over than are under age thirty-five.
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
(D) Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirty-five than for those age thirty-five or over.
(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
Finding of a survey of Systems magazine subscribers: Thirty percent of all merchandise orders placed by subscribers in response to advertisements in the magazine last year were placed by subscribers under age thirty-five.
Finding of a survey of advertisers in Systems magazine: Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.
来自报纸订阅者的调查：因为报纸里的广告而进行购买商品的人中的30% 来自于35岁以下人 来自报纸广告商的调查：大多数因为报纸里的广告而进行购买商品的人是35岁以下的 文章讨论报纸订阅者，35岁以下的人，和报纸里的广告以及购买商品的关系 关键问题在一个百分比是30%，一个是大多数，数量上存在一定差别 For both of the findings to be accurate, which of the following must be true?
(A) More subscribers to Systems who have never ordered merchandise in response to advertisements in the magazine are age thirty-five or over than are under age thirty-five. 和have never ordered merchandise的人没有关系，并且没有说明人数的差别 (B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now. 和报纸订阅者中购买商品的人数不同年份的纵向比较无关，应该和广告商的人数横向进行比较 (C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five. over age thirty-five.无关人群，偷换集合【错误，因为没有考虑没有subscribe但是order的人数】 (D) Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirty-five than for those age thirty-five or over. 35岁以下和以上的人群进行比较并不能说明35岁以下不同调查的人数的差别，35岁以上属于偷换集合 (E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine. 正确，指明了两个调查的差别点，35岁以下人群是否是订阅者，如果第二个调查中包含了很多非订阅者，就可以解释为什么一直占30%而另一个是most。作者: michaelyueyue 时间: 2010-9-25 19:38
第一道选E，这题好像很眼熟啊~不知道那里看见过。 就是说1。根据杂志的统计，是杂志订阅者又去买广告里产品的人中有30%不到35岁，也就是说这些人购买者中70%大于35岁。 2.根据那些在杂志中做广告的厂家的统计，是看了杂志上的广告又去买了广告里的产品的人中大多数是35岁以下的人