Table 4.
Slope and intercept from Passing-Bablok regressions of each parameter and car pair. r is the Pearson correlation coefficient. Slopes that differ from 1.0 by more than 10% and intercepts larger than the associated σbias value (Table 3) are in bold face.
Car Pair |
2 vs 1 |
|
3 vs 1 |
|
3 vs 2 |
|
|
||
---|---|---|---|---|---|---|---|---|---|
Parameter | Slope | intercept | r | Slope | Intercept | r | Slope | Intercept | R |
O3 | 1.07 | 1.14 | 0.95 | 1.04 | 1.04 | 0.93 | 0.98 | − 2.25 | 0.94 |
NO2 | 1.01 | − 0.85 | 0.87 | 1.10 | −1.29 | 0.76 | 1.09 | − 0.38 | 0.84 |
NO | 1.08 | − 0.13 | 0.55 | 1.00 | − 0.80 | 0.38 | 0.97 | −1.04 | 0.53 |
PN0.3–0.5 | 0.87 | 766.54 | 0.73 | 0.85 | 1661.43 | 0.60 | 0.98 | 875.43 | 0.69 |
PN0.5–1.0 | 1.00 | − 5.28 | 0.57 | 0.96 | −10.97 | 0.25 | 0.97 | −17.93 | 0.31 |
PN1.0–2.0 | 1.00 | 2.00 | 0.37 | 0.93 | − 5.20 | 0.20 | 0.99 | 0.49 | 0.36 |
PN2.0–5.0 | 0.88 | 0.75 | 0.27 | 0.72 | 9.51 | 0.28 | 0.87 | 5.55 | 0.67 |
BC | 1.56 | − 0.04 | 0.73 |