i66 



POPULAR SCIENCE MONTHLY, 



median age of graduation of all students for the decade. It will be 

 noticed that its position remains absolutely unchanged. Perhaps the 

 most noticeable exhibition presented by this plate is the pushing of the 

 great bulk of graduates in the last decade into the comparatively 

 narrow compass of the years 20-24, and the consequent great reduc- 

 tion of the numbers graduating above or below these limits as com- 

 pared with the earlier decade. 



One further observation is worth making : At first sight it appears 

 that the mode — the year in which the largest number graduates — is in 



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the first decade, the twenty-first year; while in the second decade this 

 has been pushed up, and is now the twenty-second. In this there are 

 two matters of significance. First, while the mode in the first decade 

 is 21, the percentage here is still less than it is in the same year in the 

 next decade, where the mode appears as 22; secondly, the reduction of 

 the percentages in the years below the twenty-second in the second 

 decade is largely due to the fact that in the first decade two or three 

 colleges which have a high median age of graduation have in this decade 



