Table 1.
Sign-at-the-bottom, means (SD) | Sign-at-the-top, means (SD) | Two-sided t test, values | |
Baseline odometer reading (t0) | 75,034.50 (50,265.35) | 59,692.71 (49,953.51) | t(13,474) = 17.78, P < 0.0001 |
New odometer reading (t1) | 98,705.14 (51,934.76) | 85,791.10 (51,701.31) | t(13,475) = 14.47, P < 0.0001 |
Difference in odometer readings; i.e., miles driven (t1–t0)* | 23,670.64 (12,621.38) | 26,098.40 (12,253.37) | t(13,448) = −11.331, P < 0.0001 |
This row was the outcome reported in the original paper.