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US Secondary School Enrollment vs US Tax Revenue

US Secondary School Enrollment and US Tax Revenue correlate at r = -0.38 over 34 years (1972–2022), p = 0.025. With the time trend removed, r = -0.33. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = 0.025) and the association survives trend removal (detrended r = -0.33). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
-0.38
p-value
0.025
Years compared (n)
34 (1972–2022)
95% confidence interval
-0.64 to -0.05
Correlation with the time trend removed
-0.33

Sources

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