Students in Group A spent Friday and Saturday nights studying for a test. Students in Group B spent those nights partying. Students in Group A got higher test scores than those in Group B. That outcome could be the result of a true experiment or a quasi-experimental study. To decide whether it was a true experiment, you would have to know the answer to which one of the following questions?
a. How many students spent the weekend studying, and how many went out partying?
b. Was the difference between Group A and Group B statistically significant?
c. What statistics were calculated to reach this conclusion?
d. Were students randomly assigned to Group A and Group B, or did they decide for themselves what to do with their weekend?
Ans: D
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