![]() The two-way ANOVA is an economical design, because it allows the assessment of the main effects of each factor as well as their potential interaction. The design can thus be visualized as follows:įigure 8-1 Conceptualization of Two-Way ANOVA For simplicity, let us refer to the factors as A and B and assume that each factor has two levels and each independent group has the same number of observations. The group represents a combination of levels of the two factors. We can think of this design as a table in which each cell represents a single independent group. In this case there are two independent variables (factors), each of which has two or more levels. ![]() We will introduce the two-way ANOVA with the simplest of such designs, a balanced or completely-crossed factorial design. ![]() ![]()
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