Question 1056845
The SE is z(0.975)sqrt{p*(1-p)/sqrt(n)} and that is equal to 0.03
1.96*sqrt (0.67*0.33)/n=0.03
1.96 (sqrt(.2211))=0.03 sqrt (n)
1.96*0.4702=0.03 sqrt (n)
multiply on left and square both sides
0.8494=0.0009 *n
n=0.8494/0.0009=943.75 or 944.
Choice 3