An example of a random factor in a factorial ANOVA is:

An example of a random factor in a factorial ANOVA is:
a. Studying the hydration effect of tea, coffee, juice, and cola because they are readily available, while other forms of hydration (energy drinks, beer, etc.) are not considered.
b. Not holding treatment variance constant across the levels of a factor.
c. Randomly assigning subjects to one of three antidepressant treatment groups.
d. Assigning groups based upon political party preference.

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