Question 1171215
z=(p hat-p)/sqrt(p(1-p)/n)
=(0.36-0.40)/sqrt(0.4*0.6/250)
=-0.04/0.0310
z=-1.29
this has a p-value for a 1 way test of 0.098, twice that for a two way test.
With an alpha of 0.01 P{reject Ho|Ho true} fail to reject Ho.