a politician claims that at least 70% of the voters in his district agree with his stand on the gun control issue. Test his claim at the 0.04 level...

a politician claims that at least 70% of the voters in his district agree with his stand on the gun control issue. Test his claim at the 0.04 level of significance. (Note: A random sample of 500 voters was taken from his district. 330 of them agreed with his stand.)