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US Forest Area vs US Population Aged 65+
US Forest Area and US Population Aged 65+ correlate at r = +0.75 over 34 years (1990–2023), p < 0.0001. With the time trend removed, r = -0.38. 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 -0.38. 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
- 0.56 to 0.87
- Correlation with the time trend removed
- -0.38
Sources
- US Forest Area (% of land): World Bank. US Forest Area (World Bank indicator AG.LND.FRST.ZS).
- US Population Aged 65+ (% of total): World Bank. US Population Aged 65+ (World Bank indicator SP.POP.65UP.TO.ZS).
Related pairs
- US Wind Power Generation vs US Population Aged 65+ (r = +0.99)
- 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)
- US Renewable Energy Share vs US Population Aged 65+ (r = +0.96)
Correlation does not imply causation. How the verdict is worked out.