[geokon]

A great starting book that helps build a good intution is "An Introduction to Error Analysis" by John Taylor (of Classical Mechanics fame). Basically if you are taking any kind of measurements and need to compose them intelligently this is where to start. From sig-figs to chi squared. A must read for any starting researcher

My experience otherwise with stats books has been horrendous.. (havent found a good "medium level" book to move on to yet)