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Arctic Sea Ice Extent (September) vs US College Enrollment
Arctic Sea Ice Extent (September) and US College Enrollment correlate at r = -0.80 over 31 years (1979–2022), p < 0.0001. With the time trend removed, r = +0.18. Likely spurious (shared time trend).
Verdict: Likely spurious (shared time trend). Both series mostly just trend over time. After removing that trend the correlation collapses to 0.18 — the relationship is probably coincidental, not causal.
- Pearson r
- -0.80
- p-value
- < 0.0001
- Years compared (n)
- 31 (1979–2022)
- 95% confidence interval
- -0.90 to -0.63
- Correlation with the time trend removed
- +0.18
Sources
- Arctic Sea Ice Extent (September) (million km²): NSIDC. Mean Arctic sea ice extent in September, the yearly minimum (NSIDC Sea Ice Index).
- US College Enrollment (% gross): World Bank. US College Enrollment (World Bank indicator SE.TER.ENRR).
Related pairs
- US Nuclear Power Generation vs US College Enrollment (r = +0.97)
- US Median Age vs US College Enrollment (r = +0.96)
- US Life Expectancy vs US College Enrollment (r = +0.94)
- US Infant Mortality vs US College Enrollment (r = -0.94)
- US Population vs US College Enrollment (r = +0.93)
- US College Enrollment vs US Urban Population (r = +0.93)
Correlation does not imply causation. How the verdict is worked out.