This doesn't answer your question. However, I would like to recommend "How to Read a Paper: the basics of evidence-based medicine" by Trisha Greenhalgh.
I recommend "Biostatistics: A Foundation for Analaysis in the Health Sciences" by Wayne W. Daniel (7th edition). It's not exactly an easy read but it has everything you need to know and it has problem sets and answers to help cement your understanding. You should be able to peruse it in your institution's health science library.