GMAT Critical Reasoning (CR) | Re: A recent study of college students shows that, contrary to

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.

X = special nutritional planning
Y = students’ grades

X not related positively to students’ grades.

60 students => 30 on diet plan + 30 not on diet plan
Grades were similar after the
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