Analyze the population means of a dependent variable at various levels of an independent variable using one way ANOVA test. The data need to be obtained from Katie who is conducting the research in adolescent girls. The data is about the level of aggression of the girls at four interaction levels with their mothers. Five samples are need to be identified by Katie and the research is conducted.

The aim of the ANOVA test should be to determine the influence of interaction level over the aggression level. 

I. Testing the Population Means using one way ANOVA 

A. Independent and dependent variables

B. Between subjects or Within subjects?

C. Factors involved

D. Levels involved

E. Hypothesis 

F. F - Critical value

G. Statistical interpretation

H. Decision