Statistics and math."Methodology: The survey of 1,429 adults was conducted Nov. 6-9 by the Marist Poll by phone, both cell phones and landlines using live interviewers, by text or online in both English and Spanish. The margin of error is + or - 3.4 percentage points".
I'm curious how they arrived at a 3.4% margin of error by sampling 1,429/330,000,000 Americans ?