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03 Jul 2011, 18:53
C
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19 Mar 2012, 05:52
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.
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19 Mar 2012, 14:30
@imadkho,

The question is asking us which of the following would cast the most doubt on the conclusion. The conclusion of course rests on the sample size, so when you ask how the argument can draw a valid conclusion, that's the whole point: the argument cannot make a valid conclusion.

Specifically, when it makes its conclusion regarding companies today, it fails to take into account those companies that weren't around 20 years ago. Therefore, the conclusion cannot be valid. (C) speaks to this.

(A) only talks about starting dates. We do not care when CEOs started, but old they are now. So even if a CEO started 20 years ago, he/she could still only be 45 years-old vs. one who started yesterday at a startup but is 60 years old (assuming start ups still employ someone who is 60 )
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19 Mar 2012, 21:15
I answer B, but it was clearly C. I appreciated your explanation firasath.
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19 Mar 2012, 21:58
gud question,However, fell for A
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19 Mar 2012, 22:42
IMO C.......... but fell in trap of answer B .......
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29 Mar 2012, 05:59
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.

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

i go with C..

because the comparison done is "The average age of CEO's in those same companies 20 years ago was approximately eight years younger. " which clearly tells that SAMPLE does not include new companies less than <20yrs...hence they are generalizing the CEO age...

Only C questions this assumption.
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21 Mar 2013, 16:56
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.

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

Very good question in term of statistic logic. C is correct.

What's wrong if the sample does not represent characteristics of the whole group.
Premise 1: the average age of CEOs of the companies 20 years ago was 49 (57 - 8).
Premise 2: the average age of CEOs of the same companies is 57 now.
Conclusion: Average age of CEOS in general is older

Wrong sampling technique because the companies that were chosen do not represent characteristics of the whole group. For instance, new established companies (less than 20 years old) often have young CEOs.
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22 Mar 2013, 10:36
Answer E is strong enough IMO. The conclusion is that based on the sample of companies, CEOs are older now. However, we dont kniw the exact size of the sample. What if the sample consists of only two companies but the conclusion generalizes about all companies ?

Very poor question
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03 Apr 2013, 03:11
bschool83 wrote:
Great question.

Paraphrasing the question:
e: avg age of ceo of a sample of companies = 57
avg. age of ceo of the same sample of companies 20 years ago ~ 49
c: therefore, ceo's tend to be older now

assumption: only companies that are 20 or more years old are in the group

since the assumption is only a subset of a larger set of companies, it cannot be used to generalize a statement. Hence I picked C.

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

I have a serious confusion. Everyone here believes that the restriction given in option C poses a doubt and hence is the right answer. But when the question clearly mentions that ' The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. ', how can consider this a case of subset of a larger set of companies? I assume that the statement means that same number of companies were accounted for in both the cases! Pl correct me if my understanding is wrong.
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06 Mar 2014, 18:00
firasath wrote:
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?

It helps to give the reasons why you eliminated the wrong answers....

(A) The dates when the CEO's assumed their current positions have not been specified.

The data represents the average age of CEO of the companies in the sample. It doesn't matter when they took their positions, just that they are the current CEOs.

(B) No information is given concerning the avg no of years that CEO's remain in office.

Again, the data is comparing ages of CEOs today (current CEO) vs. the age of the CEO 20 years ago, whoever it was. It doesn't matter how long they've been in office.

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

The data sample is limited to only 20+ year old companies... This should give you a clue that a limited sample cannot be the basis for a wide generalization such as the conclusion of the stimulus. This is the answer.

(D) Only approximate information is given concerning the avg age of the CEO's 20 years ago.

The approximations of the data doesn't really change the data, one set is higher and one is lower.

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

if the data sample was from all of the fortune 1000 companies vs. only 10 companies, the data would reflect a more accurate representation. This point could weaken the conclusion slightly. However, C is a stronger argument.

I go with C too...but i would put the following as the reason for eliminating option E.
Explanation: In the beginning the author puts it as " a large sample of companies" and then later in the following sentence as " in those same companies". So the information regarding the exact number of companies doesnt really matter as the comparison is being done for the same group of companies.

Correct me if am wrong.
Thanks.

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07 Dec 2015, 11:10
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08 Dec 2015, 10:43
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.

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

IMHO (C) , since -

1. Premises talks about a large survey of companies and age of CEOs of those companies 20 years ago
2. Conclusion talks about the avergae age of CEOs ( In General )
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Re: The average age of chief executive officers in a large   [#permalink] 08 Dec 2015, 10:43

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# The average age of chief executive officers in a large

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The passage provided does not contain a mathematical question or any calculations. It is a discussion about a GMAT Critical Reasoning problem, specifically a question about the average age of CEOs in a sample of companies and a conclusion drawn from that data.

**Content Structure:**
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**Analysis:**
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the passage does not contain a mathematical question or any calculations. it is focused on a logical reasoning problem.
Given a text passage, determine:
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    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
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03 Jul 2011, 18:53
C
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19 Mar 2012, 05:52
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.
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19 Mar 2012, 14:30
@imadkho,

The question is asking us which of the following would cast the most doubt on the conclusion. The conclusion of course rests on the sample size, so when you ask how the argument can draw a valid conclusion, that's the whole point: the argument cannot make a valid conclusion.

Specifically, when it makes its conclusion regarding companies today, it fails to take into account those companies that weren't around 20 years ago. Therefore, the conclusion cannot be valid. (C) speaks to this.

(A) only talks about starting dates. We do not care when CEOs started, but old they are now. So even if a CEO started 20 years ago, he/she could still only be 45 years-old vs. one who started yesterday at a startup but is 60 years old (assuming start ups still employ someone who is 60 )
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19 Mar 2012, 21:15
I answer B, but it was clearly C. I appreciated your explanation firasath.
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19 Mar 2012, 21:58
gud question,However, fell for A
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19 Mar 2012, 22:42
IMO C.......... but fell in trap of answer B .......
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29 Mar 2012, 05:59
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.

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

i go with C..

because the comparison done is "The average age of CEO's in those same companies 20 years ago was approximately eight years younger. " which clearly tells that SAMPLE does not include new companies less than <20yrs...hence they are generalizing the CEO age...

Only C questions this assumption.
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21 Mar 2013, 16:56
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.

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

Very good question in term of statistic logic. C is correct.

What's wrong if the sample does not represent characteristics of the whole group.
Premise 1: the average age of CEOs of the companies 20 years ago was 49 (57 - 8).
Premise 2: the average age of CEOs of the same companies is 57 now.
Conclusion: Average age of CEOS in general is older

Wrong sampling technique because the companies that were chosen do not represent characteristics of the whole group. For instance, new established companies (less than 20 years old) often have young CEOs.
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22 Mar 2013, 10:36
Answer E is strong enough IMO. The conclusion is that based on the sample of companies, CEOs are older now. However, we dont kniw the exact size of the sample. What if the sample consists of only two companies but the conclusion generalizes about all companies ?

Very poor question
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03 Apr 2013, 03:11
bschool83 wrote:
Great question.

Paraphrasing the question:
e: avg age of ceo of a sample of companies = 57
avg. age of ceo of the same sample of companies 20 years ago ~ 49
c: therefore, ceo's tend to be older now

assumption: only companies that are 20 or more years old are in the group

since the assumption is only a subset of a larger set of companies, it cannot be used to generalize a statement. Hence I picked C.

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

I have a serious confusion. Everyone here believes that the restriction given in option C poses a doubt and hence is the right answer. But when the question clearly mentions that ' The average age of CEO’s in those same companies 20 years ago was approximately eight years younger. ', how can consider this a case of subset of a larger set of companies? I assume that the statement means that same number of companies were accounted for in both the cases! Pl correct me if my understanding is wrong.
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06 Mar 2014, 18:00
firasath wrote:
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?

It helps to give the reasons why you eliminated the wrong answers....

(A) The dates when the CEO's assumed their current positions have not been specified.

The data represents the average age of CEO of the companies in the sample. It doesn't matter when they took their positions, just that they are the current CEOs.

(B) No information is given concerning the avg no of years that CEO's remain in office.

Again, the data is comparing ages of CEOs today (current CEO) vs. the age of the CEO 20 years ago, whoever it was. It doesn't matter how long they've been in office.

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

The data sample is limited to only 20+ year old companies... This should give you a clue that a limited sample cannot be the basis for a wide generalization such as the conclusion of the stimulus. This is the answer.

(D) Only approximate information is given concerning the avg age of the CEO's 20 years ago.

The approximations of the data doesn't really change the data, one set is higher and one is lower.

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

if the data sample was from all of the fortune 1000 companies vs. only 10 companies, the data would reflect a more accurate representation. This point could weaken the conclusion slightly. However, C is a stronger argument.

I go with C too...but i would put the following as the reason for eliminating option E.
Explanation: In the beginning the author puts it as " a large sample of companies" and then later in the following sentence as " in those same companies". So the information regarding the exact number of companies doesnt really matter as the comparison is being done for the same group of companies.

Correct me if am wrong.
Thanks.

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07 Dec 2015, 11:10
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: The average age of chief executive officers in a large [#permalink]

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08 Dec 2015, 10:43
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.

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

IMHO (C) , since -

1. Premises talks about a large survey of companies and age of CEOs of those companies 20 years ago
2. Conclusion talks about the avergae age of CEOs ( In General )
_________________

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Abhishek....

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Re: The average age of chief executive officers in a large   [#permalink] 08 Dec 2015, 10:43

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1 The chief executive officer of one o the country's most 6 31 Jan 2012, 23:18
32 The average age of chief executive officers (CEO s) in a 31 18 Jan 2010, 06:28
29 The average age of chief executive officers (CEO s) in a 20 01 Dec 2009, 08:42
The average age of chief executive officers (CEO s) in a 15 24 Jul 2008, 09:01
8 The average age of chief executive officers (CEOs) in a 8 04 Jun 2008, 19:28
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# The average age of chief executive officers in a large

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The passage provided does not contain a mathematical question or any calculations. It is a discussion about a GMAT Critical Reasoning problem, specifically a question about the average age of CEOs in a sample of companies and a conclusion drawn from that data.

**Content Structure:**
- The passage is a forum discussion about a GMAT Critical Reasoning question.
- It includes the question stem, answer choices, and various user responses with their reasoning.

**Analysis:**
TYPE: NO_QUESTION

The passage does not contain a mathematical question or any calculations. It is focused on a logical reasoning problem.