Global Methodology
The results for the 2024 life evaluation ratings are based on telephone and in-person interviews with nationally representative, probability-based samples among the adult population aged 15 and older, in 144 countries and areas throughout 2024.
For results based on the total sample of national adults in 2024, the margin of sampling error ranges between ±2.1 and ±5.4 percentage points at the 95% confidence level.
The margin of error reflects the influence of data weighting. In addition to sampling error, question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of public opinion polls.