In statistics, analysis of variance (ANOVA)'s a collection of statistical models, and their associated procedures, in which the observed variance's partitioned into components due to different explanatory variables. In its simplest form ANOVA gives a statistical test of whether the means of several groups are all equal, and therefore generalizes Student's two-sample t-test to more than two groups. Overview There're three conceptual classes of such models: Fixed-effects models assumes that the da… (More on Anova)