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This data set, originally from Adish et al. (1999), describes the iron content of food cooked in different pot types.
data(iron)
A data frame with 36 rows and 3 variables.
Pot
pot type, one of "aluminium", "clay", or "iron".
Food
food type, one of "legumes", "meat", or "vegetables".
Iron
iron content measured in mg/100 g of food.
Heiberger and Holland (2004, p. 378) use these data as an exercise on two-way ANOVA with interaction.
data(iron) str(iron)
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