Ixxiv 



Tables for Statisticians and Biometricians [VIII IX 



We will next inquire how much closer we get to this result by using a higher 

 difference formula. The following S 2 's and S' 2 's are needed for (/3): 



Hence 



R = - -0357,0686 < 5 > |l'8109 ( '5747 



,407,3665 



- -000,508] 



4253 

 6 



- -000,539] 



Thus 



These give 



# = 000,0959, for r='45, 

 = 000,1209, for r = '50. 

 d/N= -246,035 2, for r = -45, 

 = 254,7578, for r = '50. 



Whence, interpolating for d/N = -248,0000, we have 



19648 



only differing by a unit in the last figure from the actual value. 



Illustration (xiii). Intelligence and Conscientiousness. (Girls.) 



Intelligence 



Here 



and 



Hence 



(1 - O = -333,333, |(1 - *) = '351,738, 



d/N= -196,3190. 

 h = -43072, k = -38063. 



