:5aa. A box contains 10,000 tickets.  A simple random sample of
100 tickets is drawn from the box.  The sum of the numbers on the
100 tickets in the sample is 10,000.  The SD of the numbers on
the 100 tickets in the sample is 20.  20 of the 100 tickets in
the sample are marked with a 4.  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%