bhatiasanjay01 wrote:
A recent study of college students shows that, contrary to predicted results, special nutritional planning does not positively affect students 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?
(A) Performance of business executives was shown to improve drastically after major alterations were made in their diets.
(B) Honors students, after altering their diets, maintained that they did not change their study habits.
(C) Students who participated in various fitness regimens found that their grades improved appreciably after they altered their exercise habits.
(D) High school students who previously had low grades found that after they altered their diets, their grades improved dramatically.
(E) All of the college students who volunteered for the study were either in their first or second year of college.
I marked the answer at ii), because if no changes were made to the study habits then we can conclude that there was no effect of study habits on the study, hence effect of diet can be correctly determined (Whether it had some effect or not). But this answer is wrong![:(]( "Sad")
. Can anybody explain the correct answer).
Which of the following, if true, is most useful in determining the accuracy of the study described above?
(A) Performance of business executives was shown to improve drastically after major alterations were made in their diets.
(B) Honors students, after altering their diets, maintained that they did not change their study habits.
(C) Students who participated in various fitness regimens found that their grades improved appreciably after they altered their exercise habits.
(D) High school students who previously had low grades found that after they altered their diets, their grades improved dramatically.
(E) All of the college students who volunteered for the study were either in their first or second year of college.
I marked the answer at ii), because if no changes were made to the study habits then we can conclude that there was no effect of study habits on the study, hence effect of diet can be correctly determined (Whether it had some effect or not). But this answer is wrong
. Can anybody explain the correct answer).I was torn between B and D on this one. I think both prove the accuracy of the test in their own way.
B seems like the better answer because the study resulted in no change after diet change. B claims that regardless of diet, study habits don't change. Thus, that's why the nutrition study is accurate, because people don't change their study habits due to diet so therefore, people who were given better meals did not perform better than those who did not.
D on the other hand seems to suggest the test is flawed. If the diet trick worked on younger kids, it should have worked on other people? Thus, the study's results must be inaccurate?
That's how I see those two answers. I ended up choosing B but that was wrong.