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US Dollar to Euro vs US Rural Population

US Dollar to Euro and US Rural Population correlate at r = +0.79 over 27 years (1999–2025), p < 0.0001. With the time trend removed, r = +0.83. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = 0.83). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
+0.79
p-value
< 0.0001
Years compared (n)
27 (1999–2025)
95% confidence interval
0.59 to 0.90
Correlation with the time trend removed
+0.83

Sources

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Correlation does not imply causation. How the verdict is worked out.