Understand and calculate AIC, BIC, deviance, and R-squared.

Free CAS MAS-I (Modern Actuarial Statistics I) lesson in Extended Linear Models. 15 min read, ~2,310 words.

AIC; BIC. Lower is better, and BIC penalizes parameters harder once (since ). Scaled deviance measures lack of fit versus the saturated model. Unscaled deviance uses the dispersion. Deviance compares the fitted model to the saturated model, smaller is better; for a Gaussian model the deviance equals SSE. Nested GLMs...