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US Fertility Rate vs US Forest Area
US Fertility Rate and US Forest Area correlate at r = -0.75 over 34 years (1990–2023), p < 0.0001. With the time trend removed, r = +0.31. Direction flips without the trend.
Verdict: Direction flips without the trend. The raw correlation is -0.75, but once each series' time trend is removed it becomes 0.31. The year-to-year movements run the opposite way to the long-run trends, so the headline number is misleading.
- Pearson r
- -0.75
- p-value
- < 0.0001
- Years compared (n)
- 34 (1990–2023)
- 95% confidence interval
- -0.87 to -0.56
- Correlation with the time trend removed
- +0.31
Sources
- US Fertility Rate (children per woman): Our World in Data. US Fertility Rate (Our World in Data: Total fertility rate).
- 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)
- US Adolescent Birth Rate vs US Forest Area (r = -0.94)
Correlation does not imply causation. How the verdict is worked out.