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
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