Question 918898
Ho: p = 0.33 (claim)
Ha: p ≠ .33
n = 100
z = (.27 - .33)/sqrt(.33*.67/100) = -.06/.047 = -1.276
p(z < -1.276) = .10
.10 > .01
At the 1% alpha level, accept claim. 
Study does not support that rate has changed.
b) culture, less education, etc