Figure 2. Dance Class Attendance Rates by Time Period.

Attendance dropped substantially over the course of the study. Box-and-whisker plots of the girls’ mean percent attendance of all possible dance classes during their first, second, third and fourth six months of participation in the study. Means are indicated by the point, medians are the central horizontal line, the box defines the 25^th and 75^th percentiles, and whiskers indicate 1.5 interquartile ranges beyond the 25^th and 75^th percentiles. In the third and fourth six month intervals, the median and 25^th percentile overlap with a value of 0.