Fig. 3

Box plots of BV as a function of sphere ID (a), ESD (b), AC (c) and W (d) for visible spheres. Outliers and extremes are points higher than the value of the 75th percentile plus 1.5 or 3 times the interquartile distance, or lower than the value of the 25th percentile minus 1.5 or 3 times the interquartile distance, respectively