Table 3 Cross-validated R2 and corresponding RMSE values for predicted indoor Sindoor/Soutdoor, PM2.5, and BC.

From: Development of a modeling approach to estimate indoor-to-outdoor sulfur ratios and predict indoor PM2.5 and black carbon concentrations for Eastern Massachusetts households

 

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

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