@inbook{57410608, author={Stanton A. Glantz}, title={Chapter 3. How to Test for Differences between Groups}, booktitle={Primer of Biostatistics, 7e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2012}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=57410608} }