Prep T1-12

[ting52]

Prep T1-12

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. (not mentioned)
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now. (not mentioned)
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five. (文章中說是 under 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.

Ans: E

A, B, C 我是這樣排除掉的, 不知道對不對, 加上題目真的不是很懂, 想順便請問一下 D, E 錯在哪跟為什麼對. 謝啦~~

[anthonylee]

Prep T1-12

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. (not mentioned)
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now. (not mentioned)
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five. (文章中說是 under 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.

Ans: E

A, B, C 我是這樣排除掉的, 不知道對不對, 加上題目真的不是很懂, 想順便請問一下 D, E 錯在哪跟為什麼對. 謝啦~~

我是這樣想的:
(D) 原題兩個finding中並沒有提到order的價格,只有提到orders的比例中有多少是35歲以下,無法推論較少比例的orders就代表average dollar較少=>
因為有可能少數orders但是交易的金額大!

(E) 正確答案
根據Finding 1: 有30%的訂單是來自35歲以下的訂戶.
根據Finding 2: 會下訂單的大部分都是35歲以下
=> 所以另外70%的訂單都不是訂戶貢獻的

[dibert8]

文字遊戲題.
仔細比較 subscriber 和 advertiser 的敘述,會發現在 advertiser 的敘述裡 "by subscribers" 不見了.這就是正確選項的線索 (i.e. 在 advertiser 下單的不是 "by subscribers").

[ting52]

懂ㄌ 懂ㄌ
感激兩位大大前輩

[chris8888]

這一題在玩統計上的分布文字遊戲.

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.

商品訂閱___________
05%|__ subscribers (30% -> 35 years old people ; 5%*30% => 1.5%)
95%|__ not subscribers (35 years old)
Total : 100%

所以說大部分都不是訂閱者.

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. (not mentioned)
never ordered不要談不相關的
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now. (not mentioned) 去年與現在比?? 無關
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five. (文章中說是 under 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.
文章沒講over 35 years old
(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.

[Huang Hsin-Yi]

我還是沒有頓悟拉

[pleasela]

我還是沒有頓悟拉

舉個例
第一個調查: 大多數去美華泰買東西的人 都是35歲以下
第二個調查: 30%的會員去美華泰買東西 都是35歲以下

Ans: E 大多數的去美華泰買東西的人都不是會員(因為只有30%是)
這樣E就符合2個調查了

[Huang Hsin-Yi]

感謝,美華泰比較容易懂勒!

[daskooler]

美華泰的例子真的是淺顯易懂阿