Question 903679
Ho: p = .33
Ha: p > .33 (claim)
-----------------------------------------
sample proportion = p-hat = 80/200 = 2/5 = .4
---
test stat:: z(x > .4) = (0.4-0.33)/sqrt[(1/3)(2/3)/200] = .07/.03= 2.33
-----
p-value = P(z >  2.33) = 1 - P( Z < 2.33) = 1 - .99 = .01

Since the p-value is less than .02, reject Ho.
The test results support the claim.