Exercise 9.15 (continued): Let SS ( ) give sums of squares for the two-way ANOVA model using deviation-coded regressors (i.e., employing sigma constraints to reduce the model matrix to full rank), and...

Exercise 9.15 (continued): Let SS () give sums of squares for the two-way ANOVA model

using deviation-coded regressors (i.e., employing sigma constraints to reduce the model matrix to full rank), and let SS() give sums of squares for the same model using dummy-coded regressors. Working with the model for r = 2 rows and c = 3 columns, use the geometric vector representation of the model to explain why

but that, in general,