Ill] THE COEFFICIENT OF VARIABILITY 127 



61 1 1 1 1 1 r 



1 ^ 



y r^ 



American.-^ / 

 -^ / 



Japanese^ 



I I I I I \ L 



5 6 7 8 9 10 II 12 13 14 15 16 17 II 

 Age 

 Fig. 22. Variability in stature (boys). After Fleming, Bowditch and Nagai. 



3 



18 



. 10 15 



Age in years 

 Fig. 23. Coefficient of variability in stature: excess or defect of this coefficient 

 in the boy over the girl. Data from R. M. Fleming, and from Nagai. 



