statistics

Project Description:

class sizes and school performance
an experiment at the state university of new york at stony brook found that students did significantly better in classes limited to 35 students than in large classes with 150 to 200 students.
for a calculus course, failure rates were 19% for the small classes compared to 50% for the large classes.
the percentages of as were 24% for the small classes and 3% for the large classes.
these results suggest that students benefit from smaller classes, which allow for more direct interaction between students and teachers.
what other variables in the study might affect student performance?
if you were conducting the study, how would you ensure that the differences in student performance were due to class size only?
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