ON THE amount and distribution of income. 



189 



If m+ 1 is number of males receiving over 160/. and n is number of males receiving 



160?. or less, and p= , the values of p for 102 firms are as follows : — 



m-\-n 



Median -265 



Unweighted Average -305 



Weighted Average -21 



Comparison with normal curve of error. 



Modulus c = 0-25; centre 0265. 



Theory Observation 

 1 ' 1 



Avirage / 



Class 18. Insurance Clerks. — We have detailed information, which 

 is summarised on p. 188, as to about 10 per cent, of these. Though 

 this is a considerable proportion, yet it has not led to results of great pre- 

 cision, because one or two large companies which have made returns 

 show results divergent from the smaller ones. We adopt for our 

 number 14,000± 2,000 at 87l.±5l. 



Class 19. Insurance Agents. — We have no information as to this 

 class, except common observation that they are not highly paid. Of 

 course, they depend mainly on commissions. We take it that rather 

 more than half pay income-tax, that, in fact, the number required equals 

 the number over thirty-five years of age. It results that 19,000 ± 

 5,000 come within the non-paying class, the largeness of the margin 

 corresponding to the want of information. We may put the earnings 

 at 100L ± 30Z. 



1910. o 



