4 8 



Records of the Indian Museum. [Vol. XXIII 



Hence 



2* M 2 r o 



*| = 3I = — = ' 6 9 28 



From Biometric Tables XI , p. 25, we get 



»|/i =0-69 28 > 



^ = 077 71 45 C 



+! =175 7° 30^ 

 Thus <T = t 2 . d= 1757030 x 2-208333 



= 3-880107. 



Mean is at a distance A = 0-/7/ = 3-015417 (in working units) fron: 

 origin. 



From Table II:— n N= -21 85 68 5 

 Thus we get a normal curve of 



N = no individuals 



Mean =1645-3 mm. 



S.D. = 77-6 mm. 

 Curtailing at 1605 we get a fresh table:— 



Group 



1605 



1585 

 mm. 



-1565 



-1545 



-1525 



-1505 



-1485 



-1465 

 I 



-1445 Total. 



Frequency 



12 



10 



4 



2 



4 



1 



2 3 6 



we get 



Calculating " raw " moments about end of stump (1605 mm.) 



.<i , = l '/ = 2-3o 55 56 

 giving corrected 



Thus 



i 2 =9'47 22 22 



/r : = 37i 23 80 

 *i = -77=9" 6 4 45 3i 





and 



From Biometric Tables XI, p. 25, we get by interpolation 



^, = 0-64 45 31 

 /*' = o-44 33 

 t :: = i'52 32 67 

 Thus " = «/v^ = 3-511747 (in working units) 



<r = 70-2349 mm. 

 Mean Is at distance 



I > 70*2349 mm. from 1605 mm. 

 Thus Mean= 1635-14 mm. 



N A 12 27 64 2 (from Table II) 



