CorrelateAI › Pairs
US Birth Rate vs US Forest Area
US Birth Rate and US Forest Area correlate at r = -0.89 over 34 years (1990–2023), p < 0.0001. With the time trend removed, r = +0.47. Direction flips without the trend.
Verdict: Direction flips without the trend. The raw correlation is -0.89, but once each series' time trend is removed it becomes 0.47. The year-to-year movements run the opposite way to the long-run trends, so the headline number is misleading.
- Pearson r
- -0.89
- p-value
- < 0.0001
- Years compared (n)
- 34 (1990–2023)
- 95% confidence interval
- -0.95 to -0.80
- Correlation with the time trend removed
- +0.47
Sources
- US Birth Rate (per 1,000 people): World Bank. US Birth Rate (World Bank indicator SP.DYN.CBRT.IN).
- US Forest Area (% of land): World Bank. US Forest Area (World Bank indicator AG.LND.FRST.ZS).
Related pairs
- US Forest Area vs US Mobile Subscriptions (r = +0.98)
- US Forest Area vs US Resident Patent Applications (r = +0.97)
- US Adult Obesity vs US Forest Area (r = +0.97)
- US Forest Area vs US Population (r = +0.97)
- Atmospheric CO₂ (Mauna Loa) vs US Forest Area (r = +0.95)
- Atmospheric Methane (global) vs US Birth Rate (r = -0.95)
Correlation does not imply causation. How the verdict is worked out.