Unverified50% confidenceFactExact time
The calculation of the margin of error derives from the central limit theorem, with the formula MOE = z × √(p(1-p)/n), where z is approximately 1.96 at the 95% confidence level.
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50%
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Long-term
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8/4/2026
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误差范围是什么意思？教你正确解读民调数据的准确性
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