1910-11.] Study of the Tasmanian, Australian, and Papuan. 
Table II. — Continued. 
n se --497 "’ 
ju, 2 = fx 2 — fx ^ = 49 "63 , 
and 
Standard Deviation (o-*) = \/49*63 = 7*04 ± 0‘36 ; 
the Coefficient of Variation (V*) being ^ ?f / ! < Q ^P^ =a 3 , 90±0'20. 
180’30 
The Probable Errors are calculated from the usual formulae, viz. : — 
Probable Error of the Mean 
0-6745 . <r r 
J N 
0-6745 x 7-04 
-—[== =0-51 ; 
J 86 
Probable Error of the Standard Deviation 
0-6745 . cr. 
0-6745 x 7-04 
JlTi 
Probable Error of the Coefficient of Variation 
= 0-36; 
_0-6745xy{i + 2( i J 3 ) 2 } 
_ 0-6745 x 3-90{l + 2(0-039) 2 } 
’ «yi72 
= 0 - 20 . 
Table III. — Tasmanian Crania, not Separated into Sexes. 
Breadth — 
Mean Breadth (B) U 135-14 ± 0*35 
Standard Deviation (o-y) = 4*79 ±0*25 
Coefficient of Variation (V y ) = 3*54 ± 0*18 
Height — 
Mean Height (H) .= 130*26 ± 0-40 
Standard Deviation ( a-z ) = 5*49 ± 0*28 
Coefficient of Variation (V z ) = 4-21 ±0*22 
