IT ION 



613 



tion terminated at 

 points in the range 

 dots and the points 

 centers. This sec- 

 •ase in reliabiHty of 

 d is gradual. There 

 ■ven in the center as 



■ introduce a definite 

 It to the right such 

 when the value of a 

 7 shows three theo- 

 ^ame average a = 75. 

 g a = 50 and a = 100, 

 ratio of 3 :1, having 

 ial sub-series having 

 shows the effect on 

 i uniformly between 

 de up of two equal 

 v'n for comparison.'" 

 r decreases with the 

 to occur frequently, 

 imaterial whether a 

 ds in the sample, or 

 nt's happening at a 

 oughout the series a 

 ■ies the tendency to 

 levices may be em- 

 ual series, some of 

 below. 



on summation only 

 be some reason to 



.999- 



.9399- 



Pi = P{c,a,). 



.99999-^- 



.999999 



a • 0, 



