What Is ANOVA Analysis of Variance?

The ANO­VA is a sta­tis­ti­cal method used to com­pare the means of three or more sam­ples to tests for sig­nif­i­cant dif­fer­ences among group means by ana­lyz­ing the vari­ance with­in and between groups. Learn about the two types of ANO­VA, key con­cepts includ­ing fac­tor, lev­el, group and response, and the pre­con­di­tions our data must meet to con­duct a suc­cess­ful ANOVA.