Question 1191439
Ho:p=0.55
Ha: pNE 0.55
alpha=0.05 p{reject Ho|Ho true}=0.01
test is a 1-sample proportion 2 sided, with critical value being |z|>2.576
p hat=218/300=0.727
z=(phat-p)/sqrt(0.55*0.45/300)
=0.177/0.0287
6.16 
reject Ho, choice A.