Publishing Nutrition Research: A Review of Nonparametric Methods, Part 3  Jeffrey E. Harris, DrPH, RD, Carol Boushey, PhD, MPH, RD, Barbara Bruemmer, PhD, RD, Sujata L. Archer, PhD, RD  Journal of the American Dietetic Association  Volume 108, Issue 9, Pages 1488-1496 (September 2008) DOI: 10.1016/j.jada.2008.06.426 Copyright © 2008 American Dietetic Association Terms and Conditions

Figure 1 Definitions of key statistical terms. Journal of the American Dietetic Association 2008 108, 1488-1496DOI: (10.1016/j.jada.2008.06.426) Copyright © 2008 American Dietetic Association Terms and Conditions

Figure 1 Definitions of key statistical terms. Journal of the American Dietetic Association 2008 108, 1488-1496DOI: (10.1016/j.jada.2008.06.426) Copyright © 2008 American Dietetic Association Terms and Conditions

Figure 2 Normal vs right-skewed distribution for blood urea nitrogen. (A) An illustration of a normal distribution as evidenced by the bell-shaped curve. (B) An illustration of a right-skewed distribution. Journal of the American Dietetic Association 2008 108, 1488-1496DOI: (10.1016/j.jada.2008.06.426) Copyright © 2008 American Dietetic Association Terms and Conditions

Figure 3 Decision-making rubric for choosing appropriate parametric and nonparametric tests given the types of variables. Journal of the American Dietetic Association 2008 108, 1488-1496DOI: (10.1016/j.jada.2008.06.426) Copyright © 2008 American Dietetic Association Terms and Conditions

Figure 4 Example of Mann-Whitney U test calculations and interpretation. Journal of the American Dietetic Association 2008 108, 1488-1496DOI: (10.1016/j.jada.2008.06.426) Copyright © 2008 American Dietetic Association Terms and Conditions