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The average age of chief executive officers (CEOs) in a large sample

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NischalP
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Re: The average age of chief executive officers (CEOs) in a large sample [#permalink] New post   17 Dec 2019, 06:04
Karishma,

I do not completely agree with you on option C
( In the argument it is already stated that large cue of companies have been taken to compare their average ages)
So in this case why can't majority of the opinion apply as a generalisation.

I go with option A.
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The average age of chief executive officers (CEOs) in a large sample [#permalink] New post   17 Sep 2020, 23:04
spriya 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.

(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.

Like others questions on GMAT, language and logic are important to understand in this one too.

Based on the sample of companies from 20 years ago, a conclusion is drawn in "General" for all CEOs. The argument takes a leap here and C correctly points to the gaping hole in the argument, rest are just distractions.

Straight C­
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Re: The average age of chief executive officers (CEOs) in a large sample [#permalink] New post   10 Feb 2021, 23:32
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. X

Irrelevant. Suppoes we did know when the CEO started their positions – would the average age change? No. There’s no relationship between the two pieces of data.

(B) No information is given concerning the average number of years that CEO’s remain in office. X

Again, not relevant. Be careful not to spin this and say …”well perhaps the premises aren’t accurate b/c it fails to account for all of the CEOs” or something to that effect.

(C) The information is based only on companies that have been operating for at least 20 years.

Correct. A conclusion is made that CEOs IN GENERAL tend to be older so if it it’s true that the sample is restricted to companies > 20, then our ability to generalize disappears.

(D) Only approximate information is given concerning the average age of the CEO’s 20 years ago. X

Cannot attack the truth of the premise …that’s what this choice tries to do. Still, even if it were approximate – does that necessarily mean completely inaccurate? No.

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

Irrelevant.
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Re: The average age of chief executive officers (CEOs) in a large sample [#permalink] New post   13 May 2021, 03:23
conclusion: CEO's in general are older now
we are not concerned how they are older now
there can be many reasons why ceo's are older now
1- companies are hiring old aged CEOs
2- CEOs have aged since they became CEO for the first time or during their tenure, they aged ( option B)
ETC
all these reasons tell us HOW the conclusion holds true
The conclusion doesnt break if we explain the reason behind. The conclusion simply states that CEOs ARE OLDER NOW THAN A FEW YEARS BACK
Option C is the correct answer since it tells us that the sampling that we've done is faulty. We've taken similar companies hence we cannot apply the generalization from such a grouping to all kinds of companies.
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Re: The average age of chief executive officers (CEOs) in a large sample [#permalink] New post   24 May 2023, 06:32
imadkho wrote:
C strengthens the conclusion. The sample should be the same and should consist of companies which have been in business for at least 20 years; otherwise, how could any conclusion be drawn ?

I would pick A.

Please indicate the source.


Initially, I also picked A. However, the question did not ask to justify the reasons for the conclusion made here. It asked for a weakener (i.e., the conclusion is not true/in general, they may not be older now). Option C makes it clear to us that the sample is only for the companies operating for at least 20 years. Younger companies may have younger CEOs, but the sample did not consider it!!! I hope it is clear for both of us now. I am also learning.
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Re: The average age of chief executive officers (CEOs) in a large sample [#permalink]
24 May 2023, 06:32
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