Question 1168654
the half-interval, or the margin of error, 0.07=z(0.95)*sqrt p(1-p)/n
in these circumstances 0.07=1.645*sqrt(0.63*0.37/n)
square both sides 0.0049=2.706*0.2331/n
n=2.706*0.2331/0.0049=128.73 round up to 129 stands