ABSTRACT
In the previous chapter, we discussed how two factors could be studied in the same environment simultaneously. The concepts developed in Chapter 4 and Chapter 5 could be extended to include three or more factors. Studying several factors together offers the advantage of simultaneously examining the interaction between factors. Such interactions, if statistically significant, take precedence over the main effects when reporting the results of an experiment. It should be kept in mind, however, that the number of treatments to study increases rapidly as more factors are added in the experiment. This point was made in Chapter 5 when discussing factorial experiments. Additionally, as the number of factors increases in an experiment, so does the interaction between factors. This complicates the analysis and great care is required in interpreting results.
