Consider an Experiment Using Birds in Which We Create a Full

Multiple Choice

Consider an experiment using birds in which we create a full factorial design to examine the effects of seed type (low calorie vs. high calorie) and availability of a salt stick (present vs. absent) on feather stiffness. Which of the following is a representation of the model we will use to analyze the data?

A) Feather = seed + salt + seed*error
B) Feather = constant + seed + salt + seed*salt
C) Seed = salt + feather + salt*feather
D) Seed = constant + salt + feather + salt*feather