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# CEO

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Senior Manager
Joined: 02 Dec 2007
Posts: 450
Followers: 3

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06 Sep 2008, 03:52
The average age of chief executive officers (CEOs) in a large sample of companies is 57. The average age of CEOs in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEOs 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 CEOs assumed their current positions have not been specified.

B. No information is given concerning the average number of years that CEOs 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 CEOs 20 years ago.

E. Information concerning the exact number of companies in the sample has not been given.
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Manager
Joined: 02 Aug 2006
Posts: 112
Location: Mumbai
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06 Sep 2008, 08:21
I think it's B. The reason is that CEO's 20 years ago might be continuing the organisation at this time as well. So info related to average tenure of CEO in organisation needs to be given
Senior Manager
Joined: 06 Apr 2008
Posts: 437
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06 Sep 2008, 10:11
Nihit wrote:
The average age of chief executive officers (CEOs) in a large sample of companies is 57. The average age of CEOs in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEOs 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 CEOs assumed their current positions have not been specified.

B. No information is given concerning the average number of years that CEOs 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 CEOs 20 years ago.

E. Information concerning the exact number of companies in the sample has not been given.

IMO C)
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Joined: 05 Jul 2008
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06 Sep 2008, 17:21
Avg = Sum of the elements / # of elements

We are looking at a sample of companies 20 years ago and looking at the same sample and then saying that it can be concluded that CEOs in general tend to be older now.

The key is in general (which means for all companies and not the sample). There might be thousands of companies out there whose CEO's are 25-35 yrs old and can bring the average down.

Hence C
Re: CEO   [#permalink] 06 Sep 2008, 17:21
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