Question: Katie is studying aggression among adolescent girls. She believes there is a relationship between the level of interaction a girl has with her mother and the level of aggression. She has identified 5 girls who fall into each of 4 interaction levels and has measured their aggression scores. Her data are given below.

1. What are the independent variable and the dependent variable?
2. Should Katie conduct a between-subjects ANOVA or a within-subjects ANOVA? Explain your answer.
3. How many factors are involved in Katie's study?
4. How many levels are involved? Name the level(s).
5. What are the \(\mathrm{H}_{0}\) and \(\mathrm{H}_{\mathrm{a}}\) ?
6. Complete the ANOVA summary table.
7. If you use \(\alpha=.05\), what is the appropriate \(F_{\text {cit }}\) ?
8. Is the \(F_{\text {obt }}\) significant? Why or why not?
9. If the \(F_{\text {obt }}\) is significant, perform the Tukey's HSD. What should Katie conclude based on these findings?

k. If appropriate, calculate the effect size.

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