OF ATTRIBUTES IN STATISTICS. 



80S 



TABLE III. Illustrating the Variation in Associations between Defects in different 



Nationalities (1892-94). 



A. Development Defects. B. Nerve Signs. C. Low Nutrition. D. Dulness. 



Thus the statistics of the girls do not at all support the first impression given by 

 the figures for boys, and the whole of Table I. is directly adverse to any such 

 hypothesis. In 10 cases out of the 12 of that table the associations are smaller in the 

 second investigation, but in 6 cases out of 8 the proportions of defects are also 

 smaller. Finally, it must be remembered that the theorem given on p. 288 in the 

 section on Probable Errors does not lead us to expect dpriori any correlation between 

 degree of association and degree of defectiveness, and we must therefore demand 

 pretty clear proof of the existence of such an empirical relation. The facts shown 

 below that women are at once less defective and more highly associated than men, 

 and that partial coefficients of association in undefective universes are higher than 

 total coefficients, and much higher than partial coefficients in defective universes 

 (Tallies IV. and V, pp. 306-307), may be said to bring some support to such a hypo- 



