Research Article
Prediction of PM2.5 in an Urban Area of Northern Thailand Using Multivariate Linear Regression Model
Table 2
Summary of R2 and error measure for fitting results.
| Annual | ā | R2 | RMSE | SE | Mean | Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 |
| Chiang Mai | 0.28 | 0.52 | 31.1 | 61.91 | 27.33 | 22.36 | 19.07 | 82.38 | Lampang | 0.02 | 0.60 | 35.11 | 66.48 | 30.27 | 19.37 | 12.69 | 84.48 | Nan | 0.36 | 0.39 | 25.22 | 40.23 | 21.72 | 21.05 | 17.36 | 51.89 | Mean | 0.22 | 0.50 | 30.48 | 56.21 | 26.44 | 20.93 | 16.37 | 72.92 |
| Wet Season | Chiang Mai | 0.09 | 0.18 | 11.43 | 42.1 | 6.93 | 6.56 | 10.42 | 51.99 | Lampang | 0.02 | 0.18 | 11.2 | 47.37 | 7.39 | 6.77 | 12.78 | 51.34 | Nan | 0.22 | 0.26 | 10.46 | 31.47 | 7.27 | 7.08 | 8.49 | 35.28 | Mean | 0.11 | 0.21 | 11.03 | 40.31 | 7.20 | 6.80 | 10.56 | 46.20 |
| Dry Season | Chiang Mai | 0.17 | 0.4 | 42.58 | 76.91 | 39.19 | 34.07 | 35.94 | 135.62 | Lampang | 0.03 | 0.32 | 57.67 | 90.44 | 30.85 | 25.81 | 14.93 | 140.15 | Nan | 0.06 | 0.13 | 38.82 | 55.06 | 27.9 | 26.96 | 36.74 | 88.95 | Mean | 0.09 | 0.28 | 46.36 | 74.14 | 32.65 | 28.95 | 29.20 | 121.58 |
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