36 



Tables J'or titulistlciaiw and 



TABLE XXV. 



< n n 



Values of y 



I 42 V , 

 I ...-. t/ n be 



n -2 n- 4 :; -n- J 



! n^S'^5 - " 3 1 ., , 



I 5 o V n e oaa 

 \ m i 



Or, </ probability that the mean of a sample of n, drawn at random from a 

 normal population, will not exceed (in algebraic sense) the mean of the popu- 

 lation by more titan z times the standard deviation of the sample. 



