SOCIETY OF THE UNIVERSITY Of ABERDEEN. 



91 



TABLE XII. 



CO-EFFICIENTS OF CORRELATION BETWEEN HEAD LENGTH AND 



HEAD BREADTH. 



Correlation is distinctly greater in the abnormal classes than in 

 the other two. 



I may insert here the coefficient of correlation between Span 

 and Stature of our Scottish students ; it is '8442 -009, a very high 

 value, confirming the common belief as to the relation of span to 

 height. Dealing with much larger groups than mine, Professor 

 Pearson found this coefficient of correlation to run from 783 to 

 828. 1 



TABLE XIII. 



CORRELATION BETWEEN HAIR AND EYE COLOUR. 

 Mean Square Contingency Coefficient. 



Scottish Students 

 Scottish Children 

 British Schoolboys - 

 Aberdeenshire Adults 

 Scottish Insane (Males) - 



2876 

 3802 

 4203 

 3673| 

 3039 j 



This Memoir. 



Biometrika, vol. v., p. 339, Tocher. 



Ibid., vol. iii., p. 461, Pearson. 



Ibid., vol. v., p. 339, Tocher. 



You will observe that in no case is the correlation very high a 



1 Biometrika, vol. ii., p. 370. 



