Experiment on effects of diets on weight gain of rats
A data frame with 60 observations on the following 3 variables.
GainWeight gain (in grams per week)
ProteinLevel of protein (Hi or Lo)
SourceSource of protein (Beef, Cereal, or Pork)
Data from this experiment compared weight gain for 60 baby rats that were fed different diets. Half of the rats had low-protein diets (Lo) and the rest had high-protein (Hi). The source of protein was either beef, cereal, or pork.