https://www.healthaffairs.org/doi/10.1377/hlthaff.2020.00818
In a large sample, a difference of 1 or 2 percentage points may be significant. On the other hand, in a smaller sample, where there is more variation, we may need to see more than 10 percentage points to detect significant differences.
https://www.relevantinsights.com/articles/statistical-significance/
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