📊Margin of Error Calculator
The margin of error (MOE) quantifies the uncertainty in a survey result. A poll showing 60% support with ±4% MOE means the true population value likely falls between 56–64% at the stated confidence level. MOE shrinks as sample size grows.
💡
Tip: To halve the margin of error, you need to quadruple the sample size — precision is expensive. Doubling n only reduces MOE by about 30%.
⭐
Fun Fact
The margin of error in news reports almost always assumes a perfectly random sample — but most online polls use convenience samples, making the stated MOE statistically meaningless.
References
🔒
100% 무료
가입 불필요
✓
정확
검증된 공식
⚡
즉시
즉각적인 결과
📱
모바일 지원
모든 기기