Table 3 A selected summary of the multiple regression analysis
From: A study on the use of smartphones under realistic settings to estimate road roughness condition
| Â | Device D (box near gearshift) | |||||||
|---|---|---|---|---|---|---|---|---|
| Â | Vehicle 1 | Vehicle 2 | Vehicle 3 | Vehicle 4 | ||||
Observations | 492 | 592 | 421 | 450 | ||||
Multiple R | 0.847 | 0.721 | 0.869 | 0.786 | ||||
R square | 0.718 | 0.520 | 0.755 | 0.617 | ||||
Adjusted R square | 0.717 | 0.519 | 0.754 | 0.616 | ||||
F stat | 622.926 | 319.211 | 644.126 | 360.712 | ||||
| Â | Coefficients | t stat | Coefficients | t stat | Coefficients | t stat | Coefficients | t stat |
Intercept | 2.024 | 5.795 | -1.390 | -2.853 | 0.733 | 2.124 | 0.796 | 1.703 |
Magnitude | 3.190 | 27.398 | 6.138 | 20.042 | 2.984 | 29.934 | 3.823 | 19.854 |
Average speed | -0.038 | -7.370 | -0.030 | -6.673 | -0.013 | -2.558 | -0.021 | -3.503 |