xlviii 



Tables for Statisticians and Biometricians [X XVIII 



it is not needful to enter separate products, the sums being reached which are 

 placed at the foot. Next from Table XXVIII we read off 



), 5 (*)-(>, ,<?(*) -2 (5(15*)). 



These give us : 



5 (*>) = 2480, .V (**) = 356,624, 5 (a?) = UO.96,5840. 

 We have now all the numerical data for a solution. Let the required cubic be 



y = c c + c,x + Cja? + c,s*. 



Then we must make u = S(y c,, CiX c^af c,**) 1 a minimum. The resulting 

 equations are 



5 (y) = CoS (1 ) + c, 5 (*) + c,5 (af) + c,S (), 

 (*) + c, 5 (a?) + cS (a?) + c,S (), 

 c,5 



(i) 



(ii) (iii) 



(iv) 



(v) 



(vi) 



(vii) 



