If a research group plans to conduct a survey poll about an upcoming presidential election in the United States, what is a best guess regarding the minimum percentage of all likely voters that will be needed to obtain a reasonably accurate estimation of voter opinion, assuming that a random sample is obtained?

Question

Quizplus · Accepted Answer

A sample size of about 1,000 to 1,500 respondents is typically sufficient for a national poll, which often represents much less than 2% of the total voting population, yet still provides a reasonably accurate estimation of voter opinion due to the principles of statistical sampling and margin of error.

If a Research Group Plans to Conduct a Survey Poll