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US Internet Users vs US Secondary School Enrollment

US Internet Users and US Secondary School Enrollment correlate at r = +0.70 over 19 years (1990–2022), p = 8.3e-4. With the time trend removed, r = -0.35. Direction flips without the trend.

Verdict: Direction flips without the trend. The raw correlation is 0.70, but once each series' time trend is removed it becomes -0.35. The year-to-year movements run the opposite way to the long-run trends, so the headline number is misleading.

Pearson r
+0.70
p-value
8.3e-4
Years compared (n)
19 (1990–2022)
95% confidence interval
0.36 to 0.88
Correlation with the time trend removed
-0.35

Sources

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