The data below are the results of a two-factor experiment.
Use the data to do the following by hand.
(a) Calculate the cell means, row means, column means, grand mean, and the cell variances.
(b) Make an interaction plot for the data and comment on it.
(c) Estimate all the parameters in model (8.2.1).
(d) Calculate the residuals.
(e) Make a normal probability plot of the residuals and comment on it.
(f) Test for equal variances.
(g) Calculate MSAB and test to see if there is a significant interaction at the c~ = 0.05 level.
(h) Using c~ - 0.05, test to see if either factor is important. Explain what your results mean.