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Table 5 p values of post-shutdown and post-rollback PM2.5 data for treatment–control pairs (two-sided paired t-test)

From: Association of temporary Environmental Protection Agency regulation suspension with industrial economic viability and local air quality in California, United States

Frequency Treatment–control pair
Contra Costa–Sacramento Napa–Sutter
Weekly 6.17E-07 0.08321
Daily 2.20E-16 0.0009928