Question

We wish to study the effects of two food additives (plus a control treatment for a total of three treatments) on the milk productivity of cows. We have three large herds available, each of a different breed, and we expect breed to breed differences in the response. Furthermore, we expect an age effect, which we make explicit by dividing cows into three groups: those which have had 0, 1, and 2 or more previous calves. We have enough resources to study 27 animals through one breeding cycle.

- A description of the appropriate experimental design

- A skeleton ANOVA tables

Answer 1