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US Median Age vs US Forest Area
US Median Age and US Forest Area correlate at r = +0.94 over 34 years (1990–2023), p < 0.0001. With the time trend removed, r = -0.27. 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 -0.27 — the relationship is probably coincidental, not causal.
- Pearson r
- +0.94
- p-value
- < 0.0001
- Years compared (n)
- 34 (1990–2023)
- 95% confidence interval
- 0.88 to 0.97
- Correlation with the time trend removed
- -0.27
Sources
- US Median Age (years): Our World in Data. US Median Age (Our World in Data: Median age).
- US Forest Area (% of land): World Bank. US Forest Area (World Bank indicator AG.LND.FRST.ZS).
Related pairs
- US Median Age vs US Adult Obesity (r = +0.99)
- US Median Age vs US Population (r = +0.98)
- US Forest Area vs US Mobile Subscriptions (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)
Correlation does not imply causation. How the verdict is worked out.