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

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Senior Manager
Joined: 10 Nov 2004
Posts: 286
The average age of chief executive officers (CEO s) in a [#permalink]

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20 Mar 2005, 03:02
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The average age of chief executive officers (CEOâ€™s) in a large sample of companies is 57. The average age of CEOâ€™s in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEOâ€™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 CEOâ€™s assumed their current positions have not been specified.
(B) No information is given concerning the average number of years that CEOâ€™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 CEOâ€™s 20 years ago.
(E) Information concerning the exact number of companies in the sample has not been given.
Director
Joined: 19 Nov 2004
Posts: 554
Location: SF Bay Area, USA

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20 Mar 2005, 08:18
I go with C.
The stem says "The average age of CEOâ€™s in those same companies 20 years ago was approximately eight years younger."

The conclusion that CEOs tend to be older can be made only for the sample (at least 20 yrs old company) and not for all companies.
Intern
Joined: 25 Feb 2005
Posts: 42

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20 Mar 2005, 11:44
C
conclusion --> generalizing based on a fixed data (20 yrs and some companies). 'C' weakens the conclusion.
VP
Joined: 25 Nov 2004
Posts: 1479
Re: CR- Average age of CEO [#permalink]

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20 Mar 2005, 12:54
(C) The information is based only on companies that have been operating for at least 20 years.

The argument says CEOâ€™s in general tend to be older now. the conclusion is based on only the companies which are running since last 20 years. it doesnot include the age of the CEO of the companies operating for less than 20 years. so the argument doesnot include the age of CEO, who might younger than 57 yrs, of those companies.
Senior Manager
Joined: 10 Nov 2004
Posts: 286

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24 Mar 2005, 19:51
Yes, OA is C. Thanks.
24 Mar 2005, 19:51
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# The average age of chief executive officers (CEO s) in a

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