Next, run a univariate ANOVA with these two variables. Use Analyze > General linear model > univariate. elect the correct dependent and fixed factor (independent variable) variables. Click "options" to select the ollowing statistics: Descriptives, Effect Size, Observed Power, & Homogeneity of Variance. n the dialog box, click Plots > Select Treatment for the horizontal axis and Click on "Add", Select n the GLM Univariate dialog box, click Post Hoc. elect Bonferroni. elect Continue...Select "OK Report the value of Levene's test. What does this value tell you