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A researcher is examining the effects of brightness, temperature, and humidity on the eating behavior of rats, and uses a factorial experiment comparing two levels
A researcher is examining the effects of brightness, temperature, and humidity on the eating behavior of rats, and uses a factorial experiment comparing two levels of brightness (dim and bright), four different temperatures (60, 70, 80, and 90), and three humidity conditions (low, average, and high). How many factors are in the experiment?
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