Design Of Experiments, Factorials, Sas, Experiment, Optimization.
need 160 animals. For the majority of animal trials, this number is not achievable besides in poultry. Now, lets say you DO only have 32 animals and you want to do a 2⁵ full factorial. In order to estimate a treatment effect, you need to look at the top layer of the onion. With 32 animals, you will