Aggression and Maternal Interaction, Statistics Problem Example

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The independent variable is the level of maternal interaction. The dependent variable is amount of aggression exhibited by each girl.

A within-subject ANOVA should be conducted because each girl receives different levels of maternal interaction.

There are five factors involved in the study; each girl is a factor.

There are four levels involved in the experiment. The levels of maternal interaction are no interaction, low interaction, moderate interaction, and high interaction.

The null hypothesis is that there is no relationship between the level of maternal interaction and the amount of aggression within each girl. The alternate hypothesis is that the level of maternal interaction has an effect on the amount of aggression within each girl.

The F_{crit} is 3.239 with an alpha level of 0.05.

The F-test is statistically significant. The null hypothesis is to be rejected because the calculated F value of 5.910 is greater than the F_{crit} value of 3.239. The F-test shows that there is a relationship between levels of maternal interaction and aggression.

The F-test was found to be statistically significant and a relationship between levels of maternal interaction and aggression was established. The next question to be addressed is to find if aggression increases or decreases with maternal interaction levels.