The data in Table 9.28 deal with the effect of location, variety, and nitrogen application on rice yields. There are four locations (K, E, B, and C), three varieties (N, L, and B), and four levels of...

The data in Table 9.28 deal with the effect of location, variety, and nitrogen application on rice yields. There are four locations (K, E, B, and C), three varieties (N, L, and B), and four levels of nitrogen (60, 90, 120, and 150). The response is mean yield of several replicated plots for each factor level combination, so we do not have an estimate of the true error variance.