Table 1:
Confidence interval of regression line by driving condition.
Condition
Sample size
s
e
Lower (
α
= 0.001)
Upper (
α
= 0.001)
Acc. ≥ 0
1800
0.84
x
+ 0.01
1.55
0.84
x
+ 0.01 - (1.55 * 3)
0.84
x
+ 0.01 + (1.55 * 3)
Acc. < 0
900
0.87
x
- 0.24
1.96
0.87
x
- 0.24 - (1.96 * 3)
0.87
x
- 0.24 + (1.96 * 3)
Note: Acc. = acceleration;
= slip;
s
e
= standard error of slip; and
x
= acceleration.