Exam MAS-I Practice Question 156
Study guide: Exam MAS-I
A quasi-Poisson claim-frequency model is being extended with a vehicle-use variable that has 4 levels. The fits are:
| Model | Residual deviance | Residual df | Pearson X^2 |
|---|---|---|---|
| Without vehicle use | 1,962.4 | 803 | 1,905 |
| With vehicle use | 1,940.2 | 800 | 1,880 |
The dispersion parameter is estimated as Pearson's X^2 divided by the residual degrees of freedom of the larger model.
Calculate the F statistic for testing whether vehicle use belongs in the model. Give your answer to two decimal places.
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