A professor wishes to examine the benefits of an online homework session that meets once per week. He decides to analyze student understanding by administering an exam to 15 of his students, seated in the front row. How could this study be improved? Select all that apply. A. Use students in the top 10% of the class. B. Select a random sample of his students. C. Use a larger sample size. D. Administer the same exam to a group that does not participate in an online homework session.
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