WHO Global Health Observatory
who.int/data/gho
Disease burden, mortality rates, vaccination coverage, life expectancy, and health system indicators for all countries. Download data tables as CSV. Good for SIR modelling or regression IAs.
CSV downloadDisease dataAll countries
CDC WONDER
wonder.cdc.gov
US public health data — mortality, births, cancer, environmental health. Powerful query tool to get exactly the age/year/cause breakdown you need. Downloads as text/CSV.
US dataDetailed filtersFree
NASA Exoplanet Archive
exoplanetarchive.ipac.caltech.edu
Confirmed exoplanet data including orbital period, semi-major axis, mass, and radius. Perfect for an IA on Kepler's Third Law — the period vs. semi-major axis relationship is a textbook power-law regression.
CSV downloadPhysics IAKepler
UCI Machine Learning Repository
archive.ics.uci.edu
Hundreds of clean, well-documented datasets covering medical diagnosis, biology, physics, and social science. Many have 100–1000 rows and are ready to import into Sheets. Good for regression and chi-squared IAs.
CSV downloadWell documentedMany topics