\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f\f\fData Table Interstate Highways Variable Intercept Length (xi) Parameter Estimate Standard Error t-value 1.83436 0.42683 3.53 0.14213 0.02561 4.61 AADT (x 2) 0.00012 0.00002 6.16 Non-Interstate Highways Variable Parameter Estimate Intercept 1.28082 Length (xi) 0.60393 AADT (x 2) 0.00062 Standard Error t-value 0.32559 3.24829 0.01081 4.11214 0.00016 5.25078 Page 1 Data Table Hours, y 3,137 3,590 4,526 10,825 4,023 4,206 4,006 3,728 3,211 1,200 3,317 3,700 4,504 3,900 3,105 Page 1 Boiler capacity, Design pressure, Xt 120,000 65,000 150,000 1,073,877 150,000 441,000 441,000 627,000 610,000 30,000 120,000 69,000 150,000 400,000 600,000 Boiler type, Drwn type, x2 x3 x4 375 750 500 2,170 325 410 410 1 1 1 0 1 1 1 0 0 1 1 1 1 1 0 1 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1,525 1,500 325 390 700 500 390 1,400 C2 l Station y (in) x1 (ft) x2 (o) x3 (mi) Station 1 40.84 41 41.2 2 2 23.84 341 40.1 100 3 17.21 4155 33.9 68 4 37.65 71 39.5 2 5 48.79 6746 39.1 154 y in 6 7 8 9 10 x1 (ft) 21.15 18.83 14.44 42.52 13.77 51 27 91 6357 70 x2 (o) x3 (mi) 37.7 38.4 37.5 36.8 36.6 7 78 28 144 13 y x1 x2 2030 28 8 1782 15 9 3486 62 10 2339 33 9 2047 35 8 2031 34 8 1770 55 5 3957 47 11 2578 63 9 2692 54 11 \f\f\f\f\f\f