Refer to Exercise 13.25. Write the model for y assuming that you wish to enter main effect terms for the factors, but no terms for factor interactions. How many degrees of freedom will be available for estimating σ²?

Data from Exercise 13.25

Write the complete factorial model for a 2 × 2 × 4 factorial experiment where both factors at two levels are quantitative and the third factor at four levels is qualitative. If you conduct one replication of this experiment, how many degrees of freedom will be available for estimating σ²?