| Estimate Std. | Error | t value | Pr(>|t|) |
(Intercept) | 30.150451 | 1.253435 | 24.054 | <2e−16 |
mycyl | −3.133488 | 0.884613 | −3.542 | 0.000445 |
disp | 0.009615 | 0.007337 | 1.311 | 0.190772 |
hp | −0.067839 | 0.012571 | −5.396 | 1.19e−07 |
poly(weight, 2)1 | −77.039910 | 11.326679 | −6.802 | 3.95e−11 |
poly(weight, 2)2 | 21.516735 | 4.377976 | 4.915 | 1.32e−06 |