Unverified50% confidenceFactExact time
The Pew Research Center has gradually transitioned from traditional random-digit-dial telephone surveys to a probability-sampled online panel—the American Trends Panel (ATP).
1
Sources
50%
Confidence
Long-term
Relevance
8/4/2026
First Seen
Sources
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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