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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

  Device D (box near gearshift)
  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
  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