Question 1103901
Want a half-interval of 0.05
half-interval is z*sqrt(p*(1-p)/n), where p=0.5 to maximize the value of the sample size (most conservative).
z*0.5/sqrt(n)=0.05
square both sides and multiply both sides by n.
z^2*0.25=0.0025n
z=3.3
10.89*0.25=0.0025 n
n=1089