Question 1188157
Ho: pC-PE>=0
Ha: pC-PE <0
alpha =0.10 p{reject Ho|Ho true}
test stat is a z, 1-way 2 sample proportion test
reject If Z <-1.28
calculation p1=0.0889; p2=0.253 p combined = 27/165=0.164
z=(0.0889-0.253)/ sqrt (0.164*0.836)((1/90)+(1/75))
=-0.164/sqrt(0.137*0.0244)
=-2.84 
reject Ho and the proportion of those in Centerville is smaller than that those in Edge City.
p-value=0.0022