CorrelateAI › Pairs
US Forest Area vs US Urban Population
US Forest Area and US Urban Population correlate at r = +0.81 over 34 years (1990–2023), p < 0.0001. With the time trend removed, r = +0.19. 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 0.19 — the relationship is probably coincidental, not causal.
- Pearson r
- +0.81
- p-value
- < 0.0001
- Years compared (n)
- 34 (1990–2023)
- 95% confidence interval
- 0.65 to 0.90
- Correlation with the time trend removed
- +0.19
Sources
- US Forest Area (% of land): World Bank. US Forest Area (World Bank indicator AG.LND.FRST.ZS).
- US Urban Population (% of total): World Bank. US Urban Population (World Bank indicator SP.URB.TOTL.IN.ZS).
Related pairs
- US Rural Population vs US Urban Population (r = -1.00)
- US Forest Area vs US Mobile Subscriptions (r = +0.98)
- US Forest Area vs US Resident Patent Applications (r = +0.97)
- US Population vs US Urban Population (r = +0.97)
- US Adult Obesity vs US Forest Area (r = +0.97)
- US Forest Area vs US Population (r = +0.97)
Correlation does not imply causation. How the verdict is worked out.