G13.2(b) and (c)

Laboratory experiments. The ubiquity of junk food may contribute to the high prevalence of obesity in western societies. Table 13.4 lists data from a study in which 15 lab mice were randomly assigned to one of 3 groups: group 1 received a standard diet, group 2 received a diet of junk food, and group 3 received an organicdiet. The response variable is weight gains (g) over a 1-month period.

1. Explore the data with side-by-side boxplots. Discuss.
2. Calculate group means and standard deviations. Relate these summary statistics to your graphical exploration.
3. What is the Spread, Outliers, Center, and Shape (explain)