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US Median Age vs Sunspot Number

US Median Age and Sunspot Number correlate at r = -0.25 over 74 years (1950–2023), p = 0.029. With the time trend removed, r = -0.01. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = 0.029) and the association survives trend removal (detrended r = -0.01). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
-0.25
p-value
0.029
Years compared (n)
74 (1950–2023)
95% confidence interval
-0.46 to -0.03
Correlation with the time trend removed
-0.01

Sources

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