Acknowledgements

This sixteenth edition of Degrees of Freedom (the fifteenth edition was published in 1995) was primarily written (over a tortuous 15-month period) by Vince Vu, Brad Luen, Greg Hather and Frances Tong. Victor Panaretos wrote the FAQ. Special thanks to Ani Adhikari for her comments and support.

Many thanks to all the staff, faculty, and students of the Department of Statistics and the Group in Biostatistics who participated in various phases of producing this guide.