\\.\viii Tulilts j'ur Stittixticiiiiix mill liiuii<ttri<-i<inx [XVIII X X 



regard tu the spacing* <>t' tin- OOnehttlOB curves, the value of the equi probable 

 correlation is under '03, say "027. In other words no significant association can be 

 asserted. 



In the case of <r r = -1941 we are thrown back on the original formulae*. In 

 the first place we must find P for the given value of y;-, i.e. -7080 (see p. xxxv). 

 But for n' = 4 from formula (xxix), 



= 2 (-200,0578 + -280,0088 x -841 42) 

 = 871,3256. 

 To obtain r we have to use the formula below, where <r r =-1941, and 



/= | ( , 3) , the fa, fj, 4 , /i, being the normal moment functions of Table IX. 

 2 



128m' 



............... (xxxii). 



Substituting the values of <r r = '1941 and V2m = 4-852,107, we have for 



,- = 03, P= -90550, 



r = -04, P = -86501. 

 Whence for P = -87133, we have r = '038. 



We now turn to the three cases which fall inside Table XX. 



('!) Eye-colour, Father and Son. 



log X '= 2-1249 ,,ff, = -0514, 



r = 0-5 log v' = 2-0942 



_ .QS * /V 



r = 06 log = 2-2748 



;- = 0'6 log X 2 = 2-1 239 



r = 0-7 log x s =2-293.",. 

 Linear differences will suffice 



r r = -05 r = 0-5 + [1] = 0-517, 



l = 0-001. 



Hence O o-, = '0514 giv. 



= 517 + -01 2 = '529. 



Drapert' Company Jtetearch ilemoin. Diametric Series VIL " A Novel Method," etc. : Me 

 pp. 12, 13. 



