Call: lm(formula = y ~ x) Residuals: Min 1Q Median 3Q Max -0.013342 -0.012911 -0.002408 -0.000111 0.187397 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 0.002412 0.001108 2.176 0.0299 * xNA -0.002295 0.004023 -0.571 0.5685 xnon-Annex I 0.010931 0.001438 7.599 0.0000000000000947 *** --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Residual standard error: 0.01855 on 709 degrees of freedom Multiple R-squared: 0.08129, Adjusted R-squared: 0.0787 F-statistic: 31.37 on 2 and 709 DF, p-value: 0.00000000000008832