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US Median Age vs US R&D Expenditure
US Median Age and US R&D Expenditure correlate at r = +0.87 over 28 years (1996–2023), p < 0.0001. With the time trend removed, r = +0.11. Likely spurious (shared time trend).
Verdict: Likely spurious (shared time trend). Both series mostly just trend over time. After removing that trend the correlation collapses to 0.11 — the relationship is probably coincidental, not causal.
- Pearson r
- +0.87
- p-value
- < 0.0001
- Years compared (n)
- 28 (1996–2023)
- 95% confidence interval
- 0.73 to 0.94
- Correlation with the time trend removed
- +0.11
Sources
- US Median Age (years): Our World in Data. US Median Age (Our World in Data: Median age).
- US R&D Expenditure (% of GDP): World Bank. US R&D Expenditure (World Bank indicator GB.XPD.RSDV.GD.ZS).
Related pairs
- US Median Age vs US Adult Obesity (r = +0.99)
- US Median Age vs US Population (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US Median Age (r = +0.97)
- US Median Age vs US Internet Users (r = +0.97)
- US Internet Usage vs US Median Age (r = +0.97)
- US Median Age vs US GDP per Capita (r = +0.97)
Correlation does not imply causation. How the verdict is worked out.