68 Records of the Indian Museum. [Vol. XXIII, 



Standard Deviation (base No. 60) 



,.'= 77 r/ = 92-29 



and for 'ii' = 110-04. 



Transferring to Mean, we get: — 

 l : ")- Stature : — 



Mean value of Average stature = 1665*24 mm. 

 Standard Deviation = 36-90 52 mm. 



Coeff. of interracial Variability = 2*21 62 



For Standard Deviation : — 



Mean value of Standard Deviation = 59*23 mm. 

 S.D. of Standard Deviation = 9"57 58 mm. 



Coeff. of interracial V of S.D. = 16-17 



We also have /',,-— + 114*07 38 



Thus R y ,= +"4-07 38 



' 36'90 52 x 9"57 58 



= + 30 98. 

 The Prob. Error ' of R is given by —~(i - R 2 ) 



From Abac in Biometrie Tables p. 19, we find for .Y=ioo. 

 P K. of R = 'o()2. 



Thus R Mi a = -3098 + -062 



We may now consider the correlation for our selected list of 

 >-■)- reliable samples. 



Stature : — 



Mean value of Average Stature =16 6394 54 mm. 



Standard Deviation of Average Stature- 36-59 53 mm. 

 Coeff. of Variability {interracial) = 2*19 93 



Standard Deviation — 



Mean value of Standard Deviation = 59'34 53 mm. 



.1). of Standard Deviation = (V46 mm. 



Coeff. of Variation {interracial) = 10-89 



/•,,= + 125-880 



Thus R M% „= +-3283 ±-082 



Selection of more reliable values does not make any sub- 

 stantial different We may therefore- conclude that there is a 



positive interracial correlation of about +"3 between Average 



St iture and Standard Deviation. 





K. P ind L. N. G PHon " Probable Errors ol KrequencA C 



'. Trut Vol. en \. pp, .1 1 1 , 



on- 



