J. F. Tocher 
199 
found for the eight great divisions of Scotland. If = deviation from the mean 
percentage of any class in any division for boys, ay = the corresponding deviation 
from the percentage in the same division for girls, tr,,, and ay the standard devia- 
tions of the respective percentage distributions, 
r = ■ — 
and measures the general degree of resemblance between the boy and girl 
populations in the same division. 
(/S) In the second instance the values of the relative local dififerences found 
for counties and cities were used. If = the relative local difference of any class 
for boys, and lf= the corresponding relative local difference of the same class in the 
same locality for girls, then 
r = — 
and is a measure of the general resemblance between the boy and girl populations 
on the county and city basis of grouping. 
(7) In the third instance the counties alone were used, the cities being 
included in their respective counties while percentages were used as the basis, just 
as in the case of the great divisions. The following results were obtained : 
TABLE XLIV. 
Degree of Resemblance between tJie Boy and Girl Populations. 
Values of )■ 
Values of r 
Values of r 
Colour 
percentages 
Counties and 
Percentages 
Divisions 
Cities- RLD. 
Counties 
Hair : 
Fail- 
•83 
•83 
•63 
Red 
•73 
■68 
•49 
Medium 
•93 
•87 
•74 
Dark 
•72 
•68 
•72 
Black 
•89 
•71 
•73 
Average 
•82 
•75 
•66 
Ei/es : 
Blue 
•99 
•95 
•92 
Light 
•92 
•86 
•82 
Medium 
•85 
•83 
■79 
Dark 
•91 
•91 
•91 
Average 
•92 
•89 
•86 
These results show that on an average any excess or defect in the boy 
population from the general mean in any locality is accompanied in about 70 to 90 
per cent, of the cases by a corresponding excess or defect in the girl population and 
vice versa. The agreement is least in the case of red hair. 
