GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 16 Oct 2019, 17:24

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# The average age of university presidents in a large sample

Author Message
TAGS:

### Hide Tags

Manager
Joined: 08 Oct 2010
Posts: 179
Location: Uzbekistan
Schools: Johnson, Fuqua, Simon, Mendoza
WE 3: 10
The average age of university presidents in a large sample  [#permalink]

### Show Tags

28 Oct 2010, 01:55
4
9
00:00

Difficulty:

65% (hard)

Question Stats:

53% (01:34) correct 47% (01:50) wrong based on 401 sessions

### HideShow timer Statistics

The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the university presidents assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that university presidents remain in office.
(C) The information is based only on universities that have been operating for at least 25 years.
(D) Information concerning the exact number of universities in the sample has not been given.
(E) None of the answers provided cast doubt on the conclusion drawn above.
Retired Moderator
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1001
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Re: average age of university presidents  [#permalink]

### Show Tags

29 Oct 2010, 10:51
+1 C

A and B are tempting. However, based on that the sample is not representative, you cannot conclude anything about universities in general.

That's why C is correct.
_________________
"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings
Manager
Joined: 23 May 2010
Posts: 227
Re: average age of university presidents  [#permalink]

### Show Tags

29 Oct 2010, 22:12
+1 c .. we are moving from specific in formation ( universities older than 25 years ) to general conclsion about "all " the universities ......
Intern
Joined: 04 May 2009
Posts: 42
Location: Astoria, NYC
Re: average age of university presidents  [#permalink]

### Show Tags

30 Oct 2010, 04:55
I took a different spin on this, I chose C, however purely because 25 years ago there was no internet so conclusion is wrong. Can't compare the data points 25 yrs ago to now.
Director
Joined: 03 Feb 2013
Posts: 834
Location: India
Concentration: Operations, Strategy
GMAT 1: 760 Q49 V44
GPA: 3.88
WE: Engineering (Computer Software)
Re: The average age of university presidents in a large sample  [#permalink]

### Show Tags

03 Jan 2014, 08:19
feruz77 wrote:
The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the university presidents assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that university presidents remain in office.
(C) The information is based only on universities that have been operating for at least 25 years.
(D) Information concerning the exact number of universities in the sample has not been given.
(E) None of the answers provided cast doubt on the conclusion drawn above.

Do we get option e) type of option as well. None of the above? I have never seen this kind of option in OG or gmatprep.
_________________
Thanks,
Kinjal

My Application Experience : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267-40.html#p1516961

Senior Manager
Joined: 04 May 2013
Posts: 268
Location: India
Concentration: Operations, Human Resources
Schools: XLRI GM"18
GPA: 4
WE: Human Resources (Human Resources)
Re: The average age of university presidents in a large sample  [#permalink]

### Show Tags

03 Jan 2014, 11:32
The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

can't understand why "c" is the correct answer......for this weaken question.... "C" could have been an answer for a flaw question where it could be said that since the CONCLUSION pertains to all universities.... the premise should also have represented all, rather than only those universities which are at least 25 years old....inthat case "C" would have been the right answer.....

(C) The information is based only on universities that have been operating for at least 25 years.

A weaken answer could have been...." universities that have been operating for at least 25 years comprise only 10 % of all universities..".
SVP
Joined: 06 Sep 2013
Posts: 1571
Concentration: Finance
Re: The average age of university presidents in a large sample  [#permalink]

### Show Tags

01 Feb 2014, 10:08
feruz77 wrote:
The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the university presidents assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that university presidents remain in office.
(C) The information is based only on universities that have been operating for at least 25 years.
(D) Information concerning the exact number of universities in the sample has not been given.
(E) None of the answers provided cast doubt on the conclusion drawn above.

This question is indeed very similar to the one about the CEO's and answer is of course C because we can't generalize based on a sample of universities that have only been operating for the last 25 years

Hope its clear
Cheers
J
Director
Joined: 07 Aug 2011
Posts: 502
GMAT 1: 630 Q49 V27
Re: The average age of university presidents in a large sample  [#permalink]

### Show Tags

07 Mar 2015, 03:02
feruz77 wrote:
The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the university presidents assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that university presidents remain in office.
(C) The information is based only on universities that have been operating for at least 25 years.
(D) Information concerning the exact number of universities in the sample has not been given.
(E) None of the answers provided cast doubt on the conclusion drawn above.

took sometime to read through all the options.
Senior Manager
Joined: 26 Jun 2017
Posts: 399
Location: Russian Federation
Concentration: General Management, Strategy
WE: Information Technology (Other)
Re: The average age of university presidents in a large sample  [#permalink]

### Show Tags

04 Nov 2018, 11:42
feruz77 wrote:
The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the university presidents assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that university presidents remain in office.
(C) The information is based only on universities that have been operating for at least 25 years.
(D) Information concerning the exact number of universities in the sample has not been given.
(E) None of the answers provided cast doubt on the conclusion drawn above.

--- in general tend to be older now---
We see this phrase ---> we have to talk about universities in general ---> C
Math Expert
Joined: 02 Sep 2009
Posts: 58381
Re: The average age of university presidents in a large sample  [#permalink]

### Show Tags

04 Jul 2019, 01:30
feruz77 wrote:
The average age of university presidents in a large sample of universities is 62. The average age of university presidents in those same universities 25 years ago was approximately eight years younger. On the basis of those data, it can be concluded that university presidents, including those at online universities, in general tend to be older now.

Which of the following casts the most doubt on the conclusion drawn above?

(A) The dates when the university presidents assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that university presidents remain in office.
(C) The information is based only on universities that have been operating for at least 25 years.
(D) Information concerning the exact number of universities in the sample has not been given.
(E) None of the answers provided cast doubt on the conclusion drawn above.

OFFICIAL EXPLANATION:

From a study of the average ages of university presidents in ‘a large sample of universities’ a general conclusion has been arrived at, which is then presumed to be applicable to all universities.

We have been asked to identify that choice which would cast the most doubt on this conclusion. Since the question asks for the answer that casts the most doubt, one of the answers must be chosen and answer (E) none of the above is incorrect.

We should therefore look for that statement which implies that the sample universities studied did not represent the majority of universities in some important respect, and that it is therefore unscientific to arrive at a general conclusion based on this unrepresentative sample. (A ‘large sample’ may still constitute a minority of the total number of companies.)

The phrase ‘in those same universities 20 years ago’ in the third line of the passage implies that the companies taken up for the sample study were limited to those which have been operating for more than 20 years. If a many of the existing universities (including online universities) are, in fact, less than 20 years old, the phenomenon prevailing in the older universities cannot be inferred as being applicable generally to all universities. It is quite likely that the average age of the university presidents of newer universities is much less than 57.

It is (C) which implies this, and is the answer.
_________________
Re: The average age of university presidents in a large sample   [#permalink] 04 Jul 2019, 01:30
Display posts from previous: Sort by