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Hi stats/math people: I've been doing statistical analyses for a long time and have never seen anyone use a 95% CI for percentages until joining the group I work with now. Like, 78% of people reported a thing [95% CI: 73% - 81%]. I don't get it. What is the actual value of this? I understand and have reported CIs in other contexts, like with means or odds ratios. I've been asked to add these CIs to a report I wrote to align with another report where this is done.

Appreciate any insights.