Question 1195007
SE is sqrt(p*(1-p)/n)=sqrt(0.4*0.6/200)=0.0346
to be within 0.03, the z value would have to be +/-0.8670, which is probability 0.6140
to be within 0.05, the z value would have to be +/-1.445, which is probability  0.8515
z*SE=the margin of error.