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(A) Density plot of ground and predicted PM2.5 measurements in μg/m3 based on the cross-validation of the Random Forest model. (B) Bland-Altman plot of differences between ground and predicted PM2.5 in μg/ m3 against theme means of each pair. This p lot shows good agreement as 94.5% of observation pairs fall within 2 standard deviations o° the mean difference.
