Past exam of the mathematics course of the University of Cambridge / 2025 / iii / Paper 218 / 1 / e / ii

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- Solution ii

Solution

When

α_{i} = α

, the law of total variance gives

Var (Y_{i}) = μ_{i} + α μ_{i} = (1 + α) μ_{i} .

This is the quasi-Poisson mean-variance relation with constant dispersion, so the most appropriate printed p-value is

0.0982

from model2.

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