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# In a survey of all 14,000 undergraduates in a University, ov

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In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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Updated on: 08 Sep 2013, 12:25
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In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.

Originally posted by mbadreamschool18 on 08 Sep 2013, 10:24.
Last edited by Narenn on 08 Sep 2013, 12:25, edited 1 time in total.
Topic Renamed - Please use the first sentence of the stimulus to name the topic
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08 Sep 2013, 15:41
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suyash23n wrote:

I Believe the word "reported" in the sentence is what makes the difference.

There are 2 distinct info available from the passage:

1- Results of survey, whee students directly respond to the survey----> gives the result in terms of number of student who cheat in exams.
2- Exam officials reporting the numbers.

What is asked : Despite the % of students who admit to cheat declined. The number of students who were reported by exam official increased.

Option A gives you an explanation, why the numbers have increased-----> it's because the officials are more
vigilant and are reporting more such cases of cheating.

Hope that helps!

Suyash,

Your explanation was very useful in clearing the question, which I admit was a little challenging to absorb. But If I may repackage your answer, I'd do so in the following way :-

1) On one hand we have Surveys, where students report their cheating habits --> This number has declined, so overall students are cheating less
2) On the other hand, more students have been caught cheating by officials --> This number has increased and we need to try explain how this is possible, given that students are cheating less overall.

Now, from among the options as pointed out by Suyash, Option A says the officials are more vigilant/effective and this could explain the seemingly conflicting numbers.

A final explanation using simple numbers!

OLD Scenario : 100 students, 65 cheaters, lets assume 5 cheaters are caught --> 65% cheating, vigilance efficiency = 5/65 or 7.7 %

NEW Scenario : 100 students, 61 cheaters , lets assume 6 cheaters are caught --> 61 % cheating, vigilance efficiency = 6/61 or 9.8 %

Therefore, improved vigilance efficiency in the recent years CAN explain why cheaters are less, but more are being caught.

Hope this helps a little!
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##### General Discussion
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08 Sep 2013, 12:24
1
1
andybond87 wrote:
In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.

I Believe the word "reported" in the sentence is what makes the difference.

There are 2 distinct info available from the passage:

1- Results of survey, whee students directly respond to the survey----> gives the result in terms of number of student who cheat in exams.
2- Exam officials reporting the numbers.

What is asked : Despite the % of students who admit to cheat declined. The number of students who were reported by exam official increased.

Option A gives you an explanation, why the numbers have increased-----> it's because the officials are more
vigilant and are reporting more such cases of cheating.

Hope that helps!
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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14 Oct 2013, 21:52
There have been similar questions in which the answer was similar to D, I got carried away : (
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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22 Oct 2013, 05:54
andybond87 wrote:
In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.

identifying the discrepancy is quite important here. I got it wrong. To me, discrepancy was : Although the % of students admitted to cheating, both on assignments and exams, decreased; their absolute numbers increased in exams. Hence i selected B.
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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30 Oct 2013, 11:07
Why is it not D? It is equally likely that the students who did in fact cheat did not admit to cheating there by skewing the survey numbers where as the examination office efficacy in catching cheaters remained the same? Also even if the efficacy of examination office remained the same, couldn't they have caught more cheaters because there were larger number of students who cheated?
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28 Jan 2014, 07:14
suyash23n wrote:
andybond87 wrote:
In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.

I Believe the word "reported" in the sentence is what makes the difference.

There are 2 distinct info available from the passage:

1- Results of survey, whee students directly respond to the survey----> gives the result in terms of number of student who cheat in exams.
2- Exam officials reporting the numbers.

What is asked : Despite the % of students who admit to cheat declined. The number of students who were reported by exam official increased.

Option A gives you an explanation, why the numbers have increased-----> it's because the officials are more
vigilant and are reporting more such cases of cheating.

Hope that helps!

Suyash I understood your explanation.But could you please explain why option D is wrong?Thanks
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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14 Aug 2014, 07:35
Straight forward A

The process of identification is now efficient
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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27 Aug 2014, 12:33
This is a paradox question and we need to avoid answer choices that supports just one side of the paradox. A does that. It only helps explain why the officials reported increase in number of cheaters reported but doesnt help explain why the survey results declined.
C does a better job explaining the paradox by saying that it was increase in the number of students but decrease in the percentage.

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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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29 Aug 2014, 06:03
I also chose C but I knew it was kind of weird.
It's just rephrasing the same exact last sentence without providing any explanation.
I still don't see how A can be the answer. If anything, D sounds more to the point.
What's wrong with D?
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In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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29 Aug 2014, 07:03
2
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Dear ShahPranay14 and ronr34, aks456 Please find the explanations for options C and D.

In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.
- This definitely explains why the reported numbers have increased.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.
- Keep in mind, the stimulus clearly mentions "In a survey of all 14,000 undergraduates in a University", thus the number of students surveyed remains the same. If at all, C is just restating what is already stated in the stimulus. It does not provide any discrepancy. the discrepancy we are talking about is "When the percent decreased, why the numbers increased?

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.
Option D - does not provide a strong evidence because if the students did not provide correct survey this time, they may have done the same thing, the last time.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.
- Referring to the stimulus again - "In a survey of all 14,000 undergraduates in a University", all 14,000 students are surveyed, thus this is incorrect to say.

If it helped you, Kudos Please, I need them too!!
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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26 Sep 2014, 14:07
sa2222 wrote:
Dear ShahPranay14 and ronr34, aks456 Please find the explanations for options C and D.

In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.
- This definitely explains why the reported numbers have increased.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.
- Keep in mind, the stimulus clearly mentions "In a survey of all 14,000 undergraduates in a University", thus the number of students surveyed remains the same. If at all, C is just restating what is already stated in the stimulus. It does not provide any discrepancy. the discrepancy we are talking about is "When the percent decreased, why the numbers increased?

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.
Option D - does not provide a strong evidence because if the students did not provide correct survey this time, they may have done the same thing, the last time.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.
- Referring to the stimulus again - "In a survey of all 14,000 undergraduates in a University", all 14,000 students are surveyed, thus this is incorrect to say.

If it helped you, Kudos Please, I need them too!!

I still don't get it.
If the students provided false reports, and they also did it in the past, that doesn't take away from the explanation.
As I see it, D settles the paradox.
Can anyone offer a different explanation?
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26 Sep 2014, 14:34
I would like others to respond as well. But, for Option D - firstly, we don't even know which survey the stimulus is referring to. Is it referring to the survey which has 61 % as the result or the one with 65%. So, which of these surveys has the discrepancy of results? Occurred to me - when I re read it.

Thanks!
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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26 Sep 2014, 23:45
What's the difference?
This supplies an explanation as to the difference in numbers between the survey and the number of people actually caught, no?
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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29 Oct 2014, 10:43
1
I see that there's still a lot of confusion as to why "D" is an incorrect option. Lets look at the two solutions we agree upon :-

Solution 1) The Vigilance/Officials are doing a better job of finding cheaters, hence higher # of cheaters brought to book, despite overall lower # of cheating students

Solution 2) Students provided false reports......

Although it seems like both the above solutions are "correct", the 2nd solution above conflicts with the premise laid out in the question. The Premise uses the phrase "students admitted to..." which we must take to mean they were honest while reporting.

If a GMAT option seems to be "going against the given premise", you can almost surely take that to be a trick option, trying to suck you into making a mistake! Vigilance is key here! Now that you have these two solutions, would you not take the first solution, simply because it does not go against the premise?

Hope this helps! Sorry I didnt check this thread in a long time , but I hope those who come along now will find it helpful. GMAT questions will not try to go against given premise, a very useful vigilance tool; Cheers.

- Vishnu

ronr34 wrote:
I still don't get it.
If the students provided false reports, and they also did it in the past, that doesn't take away from the explanation.
As I see it, D settles the paradox.
Can anyone offer a different explanation?

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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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30 Oct 2014, 07:09
sa2222 wrote:
I would like others to respond as well. But, for Option D - firstly, we don't even know which survey the stimulus is referring to. Is it referring to the survey which has 61 % as the result or the one with 65%. So, which of these surveys has the discrepancy of results? Occurred to me - when I re read it.

Thanks!

This is the key, actually.

We are looking to resolve a paradox between the results of a study of the past four years and the results of a study a decade ago. Whether the studies were accurate or inaccurate is irrelevant--what matters is what's changed between the two surveys. Since answer choice D gives us no information indicating that students were more likely to lie on one survey than on another, Choice D gives us no ability to explain the paradox.

Hope this helps!
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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11 Jun 2015, 04:03
1
My 2 cents on this problem. BTW this question is not an official question..
Correct answer support both side of argument.

P1: In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations.
P2: The figure declined somewhat from 65 percent earlier in the decade,
P3: but the number students cheating in examinations as reported by the examination office has increased over the same period.

Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.
>> This answer has already been explained in above posts... So lets focus on rest.
Those students who used to earlier cheat in assignments have now started cheating in examinations alone.
>>Doesn't matter.
The number of students who cheat has increased but the percentage has decreased over the past 4 years.
>> In way its restating the paradox of premise which needs to be solved. So this doesn't help much.
Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.
>> What if they lied earlier as well. In that case the whole argument is invalid and no there is no paradox. So we can avoid this answer.
The sample of 14,000 students is not large enough to draw such inferences about the whole University.
>>Not relevant.
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In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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Updated on: 21 Jun 2016, 04:47

A for me also

This strongly resembles a explain the paradox question. The actual numbers used in the stimulus are meaningless except for the generalized truth that 10 years back more students used to cheat. Now less student are cheating. But University officer are reporting (catching ) more cheating students.

Simplifying the argument leads to only a strong contender OPTION A
Examination officers have become more effective in catching cheaters.

This explain the paradox in both the premises (Premise 1 -less cheater) (Premise 2- more cheaters caught in the act)

Consider this analogy :- In Africa the number of lions is continuously decreasing at a rate of 6 % percent in the last 7 years. Yet African wild life officials claim more lions are getting medical care when injured. Explain the discrepancy why despite better medical care the population of lion is decreasing.

Answer would be:- Faster vehicle and effective tranquillisers have made it easier for the wild life official to capture injured lions and aid them medically.

The number of lions is decreasing because of disease, poaching, human encroachment and injuries. Now the one who are inured are getting saved but what about the others lions who are dying of other reasons (hunting by poachers and hunters, poisoning by famers etc etc). The overall number of lions is decreasing but one subset (injured) is resisting against the overall decrease. However it does not mean that other reasons will have no effect on the overall cause.

Similarly , In this case honest student are resisting to bring the numbers of cheater down. But it does not mean that the one that are cheating, when caught will not take the overall reported cheating numbers high. And if officials have become better in catching cheaters than off course the number will go high.

hope its clear !

In a survey of all 14,000 undergraduates in a University, over the last four years, an average of 61 percent admitted to cheating on assignments and examinations. The figure declined somewhat from 65 percent earlier in the decade, but the number students cheating in examinations as reported by the examination office has increased over the same period.
Which of the following best explains the discrepancy outlined above?

The examinations office has become more effective in identifying instances of cheating.

Those students who used to earlier cheat in assignments have now started cheating in examinations alone.

The number of students who cheat has increased but the percentage has decreased over the past 4 years.

Students have not provided correct and representative answers in the survey and thus impacted the validity of the results.

The sample of 14,000 students is not large enough to draw such inferences about the whole University.
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Originally posted by LogicGuru1 on 20 Jun 2016, 07:53.
Last edited by LogicGuru1 on 21 Jun 2016, 04:47, edited 1 time in total.
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Re: In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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21 Jun 2016, 03:48
vishnuns39620 wrote:
suyash23n wrote:

I Believe the word "reported" in the sentence is what makes the difference.

There are 2 distinct info available from the passage:

1- Results of survey, whee students directly respond to the survey----> gives the result in terms of number of student who cheat in exams.
2- Exam officials reporting the numbers.

What is asked : Despite the % of students who admit to cheat declined. The number of students who were reported by exam official increased.

Option A gives you an explanation, why the numbers have increased-----> it's because the officials are more
vigilant and are reporting more such cases of cheating.

Hope that helps!

Suyash,

Your explanation was very useful in clearing the question, which I admit was a little challenging to absorb. But If I may repackage your answer, I'd do so in the following way :-

1) On one hand we have Surveys, where students report their cheating habits --> This number has declined, so overall students are cheating less
2) On the other hand, more students have been caught cheating by officials --> This number has increased and we need to try explain how this is possible, given that students are cheating less overall.

Now, from among the options as pointed out by Suyash, Option A says the officials are more vigilant/effective and this could explain the seemingly conflicting numbers.

A final explanation using simple numbers!

OLD Scenario : 100 students, 65 cheaters, lets assume 5 cheaters are caught --> 65% cheating, vigilance efficiency = 5/65 or 7.7 %

NEW Scenario : 100 students, 61 cheaters , lets assume 6 cheaters are caught --> 61 % cheating, vigilance efficiency = 6/61 or 9.8 %

Therefore, improved vigilance efficiency in the recent years CAN explain why cheaters are less, but more are being caught.

Hope this helps a little!

Dear Vishnu,

It would be really great if you clear this doubt .....
What does this line imply ?
The figure declined somewhat from 65 percent earlier in the decade
My understanding was that during the period of 61% acceptance (lets assume 1996 to 2000) there were 14000 students.
This percentage(61%) declined in comparison to a survey conducted earlier in the decade (lets say 1990 to 1994)
OR
This percentage (61%) declined in comparison to the earlier stats of the survey (lets say 1996)

If the latter is correct then I can very comfortably eliminate C else A and C both seem to justify.

Is this sentence grammatically correct ?
Regards
Teja
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In a survey of all 14,000 undergraduates in a University, ov  [#permalink]

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27 Jul 2016, 11:46
Doesn't option C also resolve the paradox.

Over the last 4 years, 14000 students have participated in the survey. Let's say 2k in year 1, 3k in year 2, 4k in year 3 and 5k in year 5. suppose in year 1, total 500 out of 2000 cheat on exams and in year 4, total 1000 out of 5000 cheat on exams. So, the number of cheaters has increased, but the percentage of cheaters has actually decreased.

In a survey of all 14,000 undergraduates in a University, ov &nbs [#permalink] 27 Jul 2016, 11:46

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