APPUCATION OF STATISTICAL METHODS 



77 



ho is al)k' to t'liul two conipoiu'iit (iistril)iilioii?i whicli wlicii .uldcd 

 togotluT a(ipr()xiiiuitc very closely to the observed freciiiencies, '\'\n- 

 ol)ser\e<l data are given in the second column of Table W and the 

 freciiiencies of Prof Pearson's conipoimd curve are given in the third 

 colinnn of the table. The probability of fit between these two dis- 

 Irilnitions is seen to be ajiproxiinalely .!)('), which is indeed very 



T.MU.K VI 

 Kowr.KAVE Ski'I-Ls • 



Ave.=i = 78.846 

 a= 4.612 

 *= .521 



Ave.=ft = 3.181 

 <ri= .178 

 <r = .126 



Ave. =0-4 



.0943 

 .189 



• Phil. Mag., Vol. I, 1901, pp. 115-119. 



high, meaning, of course, that 9G times out of 100 we may expect 

 to find a system of deviations as large or larger than that actually 

 found. The author finds, however, that the theoretical distribution 



