With random sampling, a sample size of approximately 400 provides a ±5% margin of error for a population of 331,000,000. A ±3% margin can be reached with about

With random sampling, a sample size of approximately 400 provides a ±5% margin of error for a population of 331,000,000. A ±3% margin can be reached with about 1,000 respondents. Here are a few links that explain why this works: https://www.pewresearch.org/short-reads/2017/05/12/methods-101-random-sampling/ https://www.pewresearch.org/short-reads/2017/05/12/methods-1... https://www.surveymonkey.com/curiosity/how-many-people-do-i-need-to-take-my-survey/ https://www.surveymonkey.com/curiosity/how-many-people-do-i-... https://www.cloudresearch.com/resources/guides/statistical-significance/determine-sample-size/ https://www.cloudresearch.com/resources/guides/statistical-s...