search for: secondmodel

...rst model, I think that I should use this code, but not sure: > firstmodel<-glm(y~factor(age)*factor(car)*factor(dist),family=poisson) As of the second model, I used this code, but it produces results that contradict what the previous study says (and deleting intercept does not help): > secondmodel<-glm(y~age+car+factor(dist),family=poisson) > summary(secondmodel) Call: glm(formula = y ~ age + car + factor(dist), family = poisson) Deviance Residuals: Min 1Q Median 3Q Max -14.0258 -3.3200 -0.6296 2.0575 18.1442 Coefficients: Estim...