Kaymond Pearl 
59 
In order to determine whether the departure of the regression from strict 
linearity is due simply to errors of sampling or to a fundamentally different law 
of relation between the two variables it is again necessary to have recourse to 
regression diagrams. I have selected eight diagrams which are fairly repre- 
sentative. 
DiAGKAM X. Probable Brain-weigbt for given Stature. 
Swedish Total. 
1455 148-5 151-5 154-5 157-5 160 5 163 5 166 5 169 5 172-5 175 5 178 5 181 5 184 5 187 5 190 5 
Stature ( — S) in centimetres. 
Diagram XI. Probable Brain-'weight for given Stature. 
Swedish ? Total. 
. 1350 
( 
) 
( 
) ^ 
U '( 
1 
< 
> 
( 
) 
( 
( 
) 
( 
( 
) 
) 
( 
) 
133-5 136-5 139-5 142 5 145-5 148-5 151-5 154-5 157-5 160 5 163-5 166 5 169-5 172-5 175 5 
Stature ( = S) in centimetres. 
Diagram XII. Probable Brain-weight for given Stature. 
Swedish j Young. 
145-5 148 5 151 5 154-5 157-5 160 5 163-5 166-5 169 5 172 5 175 5 178 5 181 5 184 5 187 5 190 5 
Stature { — s) in centimetres. 
8—2 
