CAKD THAXSLATOR KXPKKIMENTS 



385 



Table VII 



Card Drop Time in Milliseconds — 85 Cards in X 

 Bins — Card Support Bars Operating 



If the assignable causes contributing to this estimate are not removed 

 then this <x' is the well known parameter for control charts. 



The variable Runs may be an experimental variable which will not 

 occur in operational usage since coded cards only will be used in the 

 machines. The joijit effect, however, of this variable with all the others 

 is slight, for 



o-'wo = 2.68 ms without Runs, and 

 o-'w = 2.98 ms with Runs included. 



