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A recent study of college students shows that, contrary to

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A recent study of college students shows that, contrary to [#permalink] New post 24 Nov 2007, 16:15
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A recent study of college students shows that, contrary to predicted results, special nutritional planning does not positively affect student's grades. Sixty students, half of whom were given a nutritionally balanced diet, had grades no higher than did those students who were not placed on the diet plan.

Which of the following, if true, is most useful in determining the accuracy of the study described above?

Performance of business executives was shown to improve drastically after major alterations were made in their diets.

Honor students, after alterning their diets, maintained that they did nto change thier study habits.

Students who participated in various fitness regiments found that their grades improved appreciably after they alterned their exercise habits.

High school students who previously had low grades found that after they altered their diets, their grades improved dramatically.

All of the college students who volunteered for the study were either in their first or second year of college.
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 [#permalink] New post 24 Nov 2007, 21:15
B. Honor students, after alterning their diets, maintained that they did not change thier study habits.
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 [#permalink] New post 25 Nov 2007, 08:03
I think it's E. In order to be sure that diet could not affect student's performance, I think it would make sense to have students who are already in their first or second year in college. In order for the students to confirm that their grades haven't changed, they must at least have 1 or 2 years of experience in college to use as their point of reference. otherwise, how can they confirm that their haven't changed?
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 [#permalink] New post 25 Nov 2007, 08:12
tarek99 wrote:
I think it's E. In order to be sure that diet could not affect student's performance, I think it would make sense to have students who are already in their first or second year in college. In order for the students to confirm that their grades haven't changed, they must at least have 1 or 2 years of experience in college to use as their point of reference. otherwise, how can they confirm that their haven't changed?


I agree somewhat with this but I also think this is a poor answer if it really is the OA.

Students could just as well have had 3 weeks and saw grades improve over the last 3 weeks. Or even months. who says it has to be years? Who says it has to be term grades?

I went with B.
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 [#permalink] New post 25 Nov 2007, 09:58
i don't think it's B because we don't even know whether the students were honor students in the first place. Even if they are honor students, the whole point of this argument is that nutrition affects students' grades despite whether they're honor students. that's how i feel at least. and i think study habbits is irrelevant to the final score. they can have the same study habbits, but then end up with improved scores because of the nutrition that they had.

as for the grades, the only time you get such grades is after your exams, which should be at least 1 year. otherwise, how would they know that they haven't improved if they haven't had the initial experience in the first place? i hope i'm write. what's the OA??
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Re: CR [#permalink] New post 25 Nov 2007, 11:03
alimad wrote:
A recent study of college students shows that, contrary to predicted results, special nutritional planning does not positively affect student's grades. Sixty students, half of whom were given a nutritionally balanced diet, had grades no higher than did those students who were not placed on the diet plan.

Which of the following, if true, is most useful in determining the accuracy of the study described above?

Performance of business executives was shown to improve drastically after major alterations were made in their diets.

Honor students, after alterning their diets, maintained that they did nto change thier study habits.

Students who participated in various fitness regiments found that their grades improved appreciably after they alterned their exercise habits.

High school students who previously had low grades found that after they altered their diets, their grades improved dramatically.

All of the college students who volunteered for the study were either in their first or second year of college.


B too.


if the students, after alterning their diets, did not change their study habits, then it suffix the claim that dite did not improve the grades.
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 [#permalink] New post 25 Nov 2007, 11:36
said B with the rest of the team here
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CR [#permalink] New post 28 Nov 2007, 00:31
i will go with B. I think it makes sense.
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Re: CR [#permalink] New post 28 Nov 2007, 06:54
alimad wrote:
A recent study of college students shows that, contrary to predicted results, special nutritional planning does not positively affect student's grades. Sixty students, half of whom were given a nutritionally balanced diet, had grades no higher than did those students who were not placed on the diet plan.

Which of the following, if true, is most useful in determining the accuracy of the study described above?

Performance of business executives was shown to improve drastically after major alterations were made in their diets.

Honor students, after alterning their diets, maintained that they did nto change thier study habits.

Students who participated in various fitness regiments found that their grades improved appreciably after they alterned their exercise habits.

High school students who previously had low grades found that after they altered their diets, their grades improved dramatically.

All of the college students who volunteered for the study were either in their first or second year of college.


E.

The flaw with the argument as it stands is that performance of students who were put on the diet is compared with that of students not put on the diet. If however, the performance of students who were put on the diet improved after they were put on the diet, compared to their performance before the diet, then the actual accuracy of the statement can be assessed.

I don't see what B has anything to do with assessing the accuracy of this arg.

What's the OA?
Re: CR   [#permalink] 28 Nov 2007, 06:54
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