(Answered) In a known population of children aggression is normally

Statistics

In a known population of children, aggression is normally distributed with a µ=25, and σ=12. What is the estimated effect size if an experimental treatment where children are shown a violent film before measuring aggression has a mean of (a) 19, (b) 22, (c) 25, (d) 30, and (e) 35? For each part, also indicate whether the effect is small, medium or large?

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