A newspaper would like to conduct a nationwide survey to find the proportion p of voters who consider themselves as independent.

How large a sample n should they take to estimate p with 3% margin of error and 95% confidence? (Use a conservative method of calculating the required sample size.)

The newspaper took a random sample of 1200 voters and found that 432 considered themselves as independent. Find a 95% confidence interval for p.

Question

A newspaper would like to conduct a nationwide survey to find the proportion p of voters who consider themselves as independent.

    How large a sample n should they take to estimate p with 3% margin of error and 95% confidence? (Use a conservative method of calculating the required sample size.)

    The newspaper took a random sample of 1200 voters and found that 432 considered themselves as independent. Find a 95% confidence interval for p.