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24 Nov 2007, 17:15
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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.
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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25 Nov 2007, 09:03
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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?
