MEASUREMENTS OF TYPE AND VARIABILITY 

 TABLE I. 



Av. 100 6.0 .0 



Med. 100 5.5 .0 



A.D. 10.0 6.2 2.3 3.13 



a 12.4 7.8 2.9 3.68 



Q. 8.4 5.4 2.0 2.94 



A.D. = the average deviation from the average. 

 a :=zthe mean square deviation from the average. 



Q. = one half the difference between the 25 percentile and 75 percentile 

 measures. 



