1. The problem asks which cells are used to calculate SSA in a 2x3 ANOVA design, specifically whether SSA corresponds to rows or columns. 2. In a two-way ANOVA, SSA represents the sum of squares for factor A. Factor A is typically associated with the rows of the design. 3. The formula for SSA is: $$SSA = n_b \sum_{i=1}^{a} (\bar{Y}_{i\cdot} - \bar{Y}_{\cdot\cdot})^2$$ where $n_b$ is the number of levels in factor B (columns), $a$ is the number of levels in factor A (rows), $\bar{Y}_{i\cdot}$ is the mean of the $i$th row, and $\bar{Y}_{\cdot\cdot}$ is the grand mean. 4. This means SSA is calculated using the means of the rows (cells grouped by rows), comparing each row mean to the overall grand mean. 5. Therefore, SSA uses the row cells, not the column cells. Final answer: SSA corresponds to the rows in a 2x3 ANOVA design.