Question 1125872
a.  549/1521=36.1%
z=(p-phat)/sqrt(p*(1-p)/n)
=0.032/sqrt(0.329*0.671/1521)
=2.66
b.  probability z>2.66 is 0.0039
This is about 2/5 ths of one percent, considered to be statistically significant.  

c. That suggests that perhaps the quoted rate of 32.9% is too low.