Explanatory variables

Parameter

t-stat

Constant

−0.725

−14.145

Primary contributing factors

Followed too Close

−0.489

−2.990

Driving too Fast for Conditions

1.195

2.082

Crash manner

Rear-End (front to rear)

0.737

3.180

Mu (1)

0.412

Mu (2)

0.936

Mu (3)

2.004

Log-likelihood of constant only

−642.748

Log-likelihood at convergence

−630.1246