Distances flown by paper airplanes in an experiment with four treatments. SUMMARY: The airplane data frame has 6 rows and 4 columns. Each data point is the distance flown by one of the of 24 airplanes randomly assigned to the four treatments described below. DATA DESCRIPTION: This data frame contains the following columns: treat: No weighting of airplane nose. treat: One paper clip on the nose. treat: Two paper clips on the nose. treat: Three paper clips on the nose. SOURCE: Motivated by a class experiment (but artificial). SEE ALSO: EXAMPLES: Make side by side boxplots of the four treatments: bplot(airplane)