1922.] P. C. Mahalanobis : Analysis of Stature, 83 



Anglo-Indian Difference = 8*102 

 vS.D. of Standard Deviation = 9*3688 + -4340 



8 ' 102 QA 



9-3688 



From Biometric Table II, \(i + a)= '8o 51 055 



J(i-a)= -1948945 



Over 19% will have greater absolute variability. 



{b) Selected Non-Caste Samples greater than 25, total = 6/\. 



Mean Standard Dev. =60-6563+ 5453 mm 

 Anglo-Indian Difference = 6-7287 

 S.D of Standard Deviation = 6*4676 + -3856 



67287 

 6-4676 

 |(i + a) = -85083 

 l(i - a) = '14917 



(a) All Caste Samples total = 84 



Mean Caste S.D. = 53'07 I 4±"4 D 93 mm. 

 Anglo-Indian S.D. =67-385 

 Anglo-Indian Difference =14-314 

 S.D. of Standard Deviation = 6-3785 ±-3320 



I 4'3 I 4 

 x^JL.±q -= 2-244, 



From Biometric Table II, |(i + a)— -98 74 545 



!(i-a)= 01 25 455 



Only 12 in 1000 castes will have a greater variability than 

 the Anglo-Indian sample. Thus we may conclude that the Abso- 

 lute Variability of the Anglo-Indian sample is appreciably greater 

 than Caste Variability. 



Also 



Non-Caste Mean S.D. = 59*2830 + -6138 mm 



Caste Mean S.D. =530714 + -4693 



Caste Difference 6*2 116 + -7727 



Thus Absolute Variability of Caste samples is significantly 

 greater than Non-Caste Variability. 



(b) Selected Caste Samples greater than 25, total = 70 



Mean Selected Caste S.D. = 53'8 + -4429 mm. 



Anglo-Indian S.D. =67*385 



Anglo-Indian Difference = 13*585 ±2471 



S.D. of Standard Deviation = 5*4938 ± '3131 



13*585 

 x = -±2-Z = 2-471, 



5*4938 



