:5a.  For this problem, refer to the data of the previous
problem.  An approximate 99.7% confidence interval for the
percentage of tickets in the box which are marked with a 4 is
given by

 	
 a.  20% +/  12% 

 	
 b.  20% +/  8% 

 	
 c.  20% +/  4% 

 	
 d.  20% +/  2% 

 	
 e.  20% +/  1%