:2.  A box contains 10,000 tickets.  Neither the box average
nor the box SD are known. It is known that the box histogram
follows the normal curve very closely.

      Two tickets are drawn at random from the box.  The numbers
on the two tickets are 1 and 3.  A 95% confidence interval for
the box average is closest to

 	
 a.  from 1 to 3 

 	
 b.  from -1 to 6 

 	
 c.  from -7 to 11 

 	
 d.  from -11 to 15 

 	
 e.  It is hopeless to find 95% confidence intervals for     
such small samples.