20,000 

 5,000 



1.000 



500 



.02 -03 .O^ -05 



Allow<3ble Error 



600 

 500 

 400\ 



/OO 

 





cv=.s 



^20,000 



\\ ^ 5, 000 





2,000 





1.000 





^500 















.02 .03 .0^ .05 



Al lowdble Error 



C/=.7 



1^ 400 

 ^ 200 

 



■ ^20,000 



-\ / s.ooo 





2,000 





1.000 





500 















.02 . 03 . 04 . 05 



Al low<3ble Error 



.02 -03 .04 .05 



Allow<3ble Error 



20.000 

 5000 



CV=.6 



.02 -03 .04 .05 



Al lowdble Error 



/600-\ 



20. 000 



s.ooo 



.02 . 03 . 04 . 05 



Allowable Error 



Figure 2. Graphs showing the number of units in the sample needed for 

 allowable errors of 2 percent to 5 percent, for sale sizes of 500 to 

 20,000 units, and ooeffioients of variation of 0.3 to 0.8. 



