Question 1191257
error=half-interval of a 99%CI=z(0.995)*sqrt(0.5*0.5/n) for most conservative estimate.
0.02=2.576*sqrt(0.25/n)
square both sides
0.0004=6.636*0.25/n
n=1.6589/0.0004
=4147.36 or 4148 units