:4. A box contains 1,000,000 tickets. An unknown percentage of
them are red; the rest are blue. A random sample of 400 tickets
are drawn from the box. An approximate 95% confidence interval
for the percentage of blue tickets in the box is closest to
a. 212% +/ 5%
b. 53% +/ 5%
c. 53% +/ 10%
d. 53% +/ 2.5%

e. 212% +/ 2.5%