Students in Group A spent Friday and Saturday nights studying for a test. Students in Group B spent those nights partying. Students in Group C spent those nights resting. You expect that those who study on the weekends to do better on their exam than those who rest or party. Which of the following best represents the null hypothesis for this study?
a. Studying on weekend evenings does not increase test scores compared to resting or partying.
b. Studying on weekend evenings increases test scores compared to resting or partying.
c. Weekend evening activity affects test scores.
d. Weekend evening activity does not affect test
scores.
Ans: D
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