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A researcher is examining whether the effect of violent video games on aggressive behavior is the...

A researcher is examining whether the effect of violent video games on aggressive behavior is the same at different ages. She recruited 90 participants, 30 from elementary schools, 30 from junior high schools and 30 from senior high schools. She then assigned half of the participants in each age group to play violent video games and another half to play non-violent video games. Aggressive behaviors were observed after children playing video games.

Question: Which type of analysis is most appropriate for this study?

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