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# The average age of chief executive officers (CEO s) in a

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Manager
Joined: 30 Mar 2009
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21 Apr 2009, 02:32
IMO C

Same explanation as scthakur
Senior Manager
Joined: 18 Feb 2008
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Location: Kolkata

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21 Apr 2009, 07:33
Oa is C.thanks for the explanation.
Intern
Joined: 01 Sep 2009
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The average age of chief executive officers (CEO s) in a [#permalink]

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01 Dec 2009, 08:42
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The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s 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 CEO’s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEO’s remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.

Last edited by Narenn on 30 Oct 2013, 20:25, edited 2 times in total.
Necessary corrections for 'Bumping for review' project
Senior Manager
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01 Dec 2009, 09:18
is it A ?
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Press +1 Kudos, if you think my post gave u a tiny tip

Manager
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01 Dec 2009, 09:23
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This is a good one. I think it should be C. The information is based on companies that have been operating for at least 20 years, is not an accurate representation of the ages of CEOs in general. There might younger companies with younger CEOs. Perhaps CEO's age just corresponds to the age of the company.
Joined: 20 Aug 2009
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01 Dec 2009, 09:45
Agree with (C): General trend means that same should be true for younger companies. but no information is given about them.
Manager
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01 Dec 2009, 09:47
1
KUDOS

Even though the sample size is large, the fact that the study only only incorporates companies that have been around for 20+ years. The conclusion then states that " CEO's of companies in general now tend to be older ", but it does not consider companies that have been around for a shorter period of time.
Intern
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01 Dec 2009, 21:04
I also agree with C.

But what is the correct answer.
Intern
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02 Dec 2009, 05:32
Guys OA is "C" but can you tell me why not "E"?
Manager
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02 Dec 2009, 07:35
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The question states in a large sample the CEO's are on average 8 years older than they were 20 years ago. Because the question already tells you that a large sample is used, knowing the exact number of firms in the survey to determine whether the study is viable or not is not necessary. Also, so what if you know the number of companies that took the survey. That information is useless because you don't know how many firms out of how many considered took the survey. For example, if you know 50 firms took the survey. Is it 50 out of 100 firms or 50 out of 10,000.
Manager
Joined: 17 Aug 2009
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03 Dec 2009, 00:18
Good one.
I picked A initially but then realized it was the generic picture that needed identification
C is correct
Senior Manager
Joined: 21 Dec 2009
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The average age of chief executive officers (CEO s) in a [#permalink]

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18 Jan 2010, 06:28
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The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s 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 CEO’s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEO’s remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.
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Last edited by dentobizz on 01 Nov 2013, 11:36, edited 1 time in total.
Intern
Joined: 14 Jan 2010
Posts: 23
Re: The average age of chief executive officers (CEO’s) [#permalink]

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18 Jan 2010, 12:53
is it E?
Senior Manager
Joined: 21 Dec 2009
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Re: The average age of chief executive officers (CEO’s) [#permalink]

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18 Jan 2010, 13:15
OA is
[Reveal] Spoiler:
C

But I need the logic myself. I choose wrong answer myself.
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SD

Senior Manager
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Re: The average age of chief executive officers (CEO’s) [#permalink]

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18 Jan 2010, 13:35
2
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SudiptoGmat wrote:
The average age of chief executive officers (CEO’s) in a large sample of companies is 57. The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEO’s 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 CEO’s assumed their current positions have not been specified. ---> Doesnt matter
(B) No information is given concerning the average number of years that CEO’s remain in office. ---> What if some CEO assumed the rank after 60 or 40 and stayed for 1/10 year?? Not strong enough
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago. --> Clearly out
(E) Information concerning the exact number of companies in the sample has not been given. --> Clearly out

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Joined: 20 Aug 2009
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Re: The average age of chief executive officers (CEO’s) [#permalink]

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18 Jan 2010, 14:36
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You have to show that in fact CEOs aren't getting older. Good way to do it is to attack the evidence - that is the survey of 57 companies. Maybe these companies are not representative of market in general, so we cannot deduce the general trend based solely on these companies.

(C) does exactly the same - if the survey includes only the companies with history of 20 years or more, it cannot be representative of all companies and cannot describe general trend.
Senior Manager
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Re: The average age of chief executive officers (CEO’s) [#permalink]

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18 Jan 2010, 16:07
Thanks buddy for such a good explanation
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Intern
Joined: 14 Jan 2010
Posts: 23
Re: The average age of chief executive officers (CEO’s) [#permalink]

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19 Jan 2010, 06:56
agree with the above

E could have been a strong contender if there were no such words like "large sample" in the 1st sentence and "those same companies" in the 2nd

thanks
Manager
Joined: 01 Feb 2010
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11 Mar 2010, 07:46
suyashjhawar wrote:
The average age of chief executive officers in a large sample of companies is 57.The average age of CEO's in those same companies 20 years ago was approximately eight years younger. On the basis of those data,it can be concluded that CEO's 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 CEO's assumed their current positions have not been specified.
(B) No information is given concerning the avg no of years that CEO's remain in office.
(C) The information is based only on companies that have been operating for at least 20 years.
(D) Only approximate information is given concerning the avg age of the CEO's 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.

[Reveal] Spoiler: OA
C

Needed your views.Came down to two but then not confident.

Its C. As per question stmt the sample is same companies 20 years ago which could represent smaller set 20 years ago so may not represent the true picture.
Manager
Joined: 27 Aug 2009
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11 Mar 2010, 14:49
C is correct
Re: Cr   [#permalink] 11 Mar 2010, 14:49

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