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US Wind Power Generation vs US Imports

US Wind Power Generation and US Imports correlate at r = +0.44 over 42 years (1983–2024), p = 0.0036. With the time trend removed, r = -0.78. Direction flips without the trend.

Verdict: Direction flips without the trend. The raw correlation is 0.44, but once each series' time trend is removed it becomes -0.78. The year-to-year movements run the opposite way to the long-run trends, so the headline number is misleading.

Pearson r
+0.44
p-value
0.0036
Years compared (n)
42 (1983–2024)
95% confidence interval
0.16 to 0.66
Correlation with the time trend removed
-0.78

Sources

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