BIOMETRY 



61 



TABLE 1 



Showing the Vahiation in Height and Weight and the Correlation 



BETWEEN Height and Weight among 1000 Harvard Students 



OF Ages 18-25 Measured at the Harvard Gymnasium 



IN THE Years 1914-1916 



Mean height = 175.33 cm. (5 ft. 9 in.) 

 Mean weight = 65.66 kilos. (144.75 lbs.) 

 a height = 6.58 cm. 



a weight = 7.84 kilos. 



C V height = 3.76 % 

 C F weight = 11.94% 

 r height-weight = .64 



It expresses the result of the simultaneous action of several 

 independent causes, or contingencies. If, for example, I toss 

 ten coins in the air simultaneously, it is certain that each one 

 will show uppermost on landing either a head or a tail, but 

 the landing of one coin does not affect that of the others. 

 The landing of each coin is a separate contingency. If the 



