What kind of question would be best examined with a repeated-measures ANOVA?

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The Answer is If I wanted to examine differences in the average scores of a sample over time or across trials. For example, if I wanted to determine whether a sample of high school students is more likely to use drugs before experiencing a drug-prevention course, right after finishing a drug-prevention course, or 6 months after finishing a drug prevention course, a repeated-measures ANOVA would be appropriate.

What Kind of Question Would Be Best Examined with a Repeated-Measures