Question 1155775
the error is +/-1.96*sqrt(p*(1-p)/n)=0.08
assume p=0.5. This will give the most conservative estimate
square both sides 
3.84(0.5*0.5/n)=0.0064
0.91/n=0.0064
n=0.91/0.0064=142.18 or rounding up to 143 people.