The data given in data frame Insurance consist of the
numbers of policyholders of an insurance company who were
exposed to risk, and the numbers of car insurance claims made by
those policyholders in the third quarter of 1973.
InsuranceThis data frame contains the following columns:
Districtfactor: district of residence of policyholder (1 to 4): 4 is major cities.
Groupan ordered factor: group of car with levels <1 litre, 1--1.5 litre, 1.5--2 litre, >2 litre.
Agean ordered factor: the age of the insured in 4 groups labelled <25, 25--29, 30--35, >35.
Holdersnumbers of policyholders.
Claimsnumbers of claims
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S-PLUS. Fourth Edition. Springer.
## main-effects fit as Poisson GLM with offset
glm(Claims ~ District + Group + Age + offset(log(Holders)),
data = Insurance, family = poisson)
# same via loglm
loglm(Claims ~ District + Group + Age + offset(log(Holders)),
data = Insurance)
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