A given value or specific setting of a quantitative factor. Repeating the experiment to gain insight into the possible interaction between variables. We can study the effects of several factors in the same set of experiments. We can test for the effect of each factor at all levels of the other factors and can discover whether or not this effect changes as the other factors change. We can test not only for the effects of the factors separately, but also for interactions.
Factorial experiments are more sensitive in the detection of small effects.
To pinpoint the most important variables - i.e. Red X , Pink X To separate and quantify the main and interaction effects of the important variables. The power of the full factorial is that every one of the up to four chosen variables is tested with all levels of every other variable. Thus all the possible combinations of factors and levels are tested, allowing for the systematic separation and quantification of all main effects, as well as, interaction effects. Select the factors to be investigated. Draw up the matrix or go to the worksheet.