PROBLEAI 150 



i:r, 



instructor will give you an individual numl)or. Hand in your 

 results with your number to one pupil of the elass who will lahulate 

 the figures on the board. 



Make a j2;rapli showin<;- the individual variation in circumference 

 of the wrist in the members of your class. 



Conclusion. — Is there variation in this measurement amcjn^ the 

 members of your class? 



20 



Zl 



2^ 



23 



2 1 



2^r 



NOTE. — Exercises on variation am numerons and may bo worked out from 

 charts, from collected material showing variations, or from work done by pupils in 

 the field. In every case where possible, a graph should be made to illustrate the 

 normal and the variation from the normal. The exercise that follows will show 

 the method to be used. 



