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# A survey of alumni of the class of 1960 at Aurora University

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A survey of alumni of the class of 1960 at Aurora University [#permalink]

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16 Dec 2010, 08:20
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Difficulty:

(N/A)

Question Stats:

65% (00:54) correct 35% (01:17) wrong based on 58 sessions

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A survey of alumni of the class of 1960 at Aurora University yielded puzzling results. When asked to indicate their academic rank, half of the respondents reported that they were in the top quarter of the graduating class in 1960.

Which one of the following most helps account for the apparent contradiction above?
(A) A disproportionately large number of high-ranking alumni responded to the survey.
(B) Few, if any, respondents were mistaken about their class rank.
(C) Not all the alumni who were actually in the top quarter responded to the survey.
(D) Almost all of the alumni who graduated in 1960 responded to the survey.
(E) Academic rank at Aurora University was based on a number of considerations in addition to average grades.

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Senior Manager
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Schools: Michigan (Ross) - Class of 2014
GMAT 1: 730 Q49 V39
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WE: Corporate Finance (Aerospace and Defense)

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16 Dec 2010, 09:42
abhi758 wrote:
A survey of alumni of the class of 1960 at Aurora University yielded puzzling results. When asked to indicate their academic rank, half of the respondents reported that they were in the top quarter of the graduating class in 1960.

Which one of the following most helps account for the apparent contradiction above?
(A) A disproportionately large number of high-ranking alumni responded to the survey.
(B) Few, if any, respondents were mistaken about their class rank.
(C) Not all the alumni who were actually in the top quarter responded to the survey.
(D) Almost all of the alumni who graduated in 1960 responded to the survey.
(E) Academic rank at Aurora University was based on a number of considerations in addition to average grades.

I say A

Because if a higher number of high ranking alumni responded than lower ranked alumni, the proportion of respondants who were a higher rank (top 25 percent) would be greater.
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Manager
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16 Dec 2010, 11:37
A.

Suppose, total number of alumni of class 1960 - 100
Total number of alumni who responded to survey - 50
Every body in top quarter (1/4) of class responded - 25 (which is half of total number of respondents)

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Manager
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Posts: 247

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16 Dec 2010, 11:59
Good responses! Well-explained Anshu..

OA
[Reveal] Spoiler:
A

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06 May 2011, 03:53
A in 0:48 min .
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Re: A survey of alumni of the class of 1960 at Aurora University [#permalink]

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18 Apr 2013, 02:09
abhi758 wrote:
A survey of alumni of the class of 1960 at Aurora University yielded puzzling results. When asked to indicate their academic rank, half of the respondents reported that they were in the top quarter of the graduating class in 1960.

Which one of the following most helps account for the apparent contradiction above?
(A) A disproportionately large number of high-ranking alumni responded to the survey.
(B) Few, if any, respondents were mistaken about their class rank.
(C) Not all the alumni who were actually in the top quarter responded to the survey.
(D) Almost all of the alumni who graduated in 1960 responded to the survey.
(E) Academic rank at Aurora University was based on a number of considerations in addition to average grades.

Clearly A:

For example: class 1960 has 100 students ==> 25% = 25 people.
But in the survey, there was only 50 students participated and 1/2 of them which is 25 people was in the top quarter.
==> 1/2 of respondents accounts for top 25% of the graduating class in 1960.
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Re: A survey of alumni of the class of 1960 at Aurora University [#permalink]

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18 Apr 2013, 12:32
Good question...Sure A...
If the wtd avg of the students in top qrtr was more than surely this is a flaw or contradiction .....

Consider kudos if my post helps!!!!!!!!1
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Re: A survey of alumni of the class of 1960 at Aurora University   [#permalink] 18 Apr 2013, 12:32
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# A survey of alumni of the class of 1960 at Aurora University

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