#### Answer

a)780 adults.
b)23%
c)male:48.47%, female:51.53%
d)We don't know.
e)We don't know.

#### Work Step by Step

a) 52%=0.52, $0.52\cdot 1500=780 \ adults.$
b)$\frac{345}{15000}=0.23=23$%
c)male:$\frac{727}{1500}=0.4847=48.47$%, female:$\frac{773}{1500}\approx0.5153=51.53$%
d)We don't know, because we don't know how to find out whether it is statisitically significant.
e)We don't know, because saying that something is signifcant is really subjective.