Hi,

I am currently working with Statistica 12 and have the following problem: I have two binary factors X_{1} and X_{2} and one continuous response variable Y and I try to perform a two-way ANOVA analysis without interaction between the factors. When I want to check the assumption of constant variance, I go to the 'Assumptions' tab to get the result of Levene's test. But Statistica doesn't let me select the X_{1}*X_{2} effect! I am only allowed to select either a X_{1} effect or a X_{2} effect.

So how do I check whether the variances are equal in the four groups using Levene's test? Or is it not nessecary to have equal variances in the four groups in a two-way ANOVA without interaction?

Thanks in advance

Tony