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Cross-validated R2 and corresponding RMSE values for predicted indoor Sindoor/Soutdoor, PM2.5, and BC.
| R2 (unitless) | RMSE (μg/m3) | Intercept bias (μg/m3) | Slope bias (unitless) | |
|---|---|---|---|---|
| Indoor sulfur model | 0.89 | 0.038 | − 0.02 | 1.05 |
| Indoor PM2.5 model | 0.79 | 1.695 | 0.38 | 0.90 |
| Indoor BC model | 0.76 | 0.122 | 0.01 | 1.01 |
