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?

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B) Feather = constant + seed + salt + seed*salt. This model represents a full factorial design where both main effects (seed type and salt stick availability) and their interaction (seed*salt) are included to predict feather stiffness.

Consider an Experiment Using Birds in Which We Create a Full