: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 <p>

a.  20% +/  12%  <p>

b.  20% +/  8%  <p>

c.  20% +/  4%  <p>

d.  20% +/  2%  <p>

e.  20% +/  1%  <p>