This "t3 vs. t4" plot illustrates values of t3 plotted against t4 for each site as light gray dots. The black dot represents the site that has been selected in the site drop-box. In addition, the t3/t4 relationships for all 2- and 3-parameter distributions are graphed. The 2-parameter distributions are plotted as points, while 3-parameter distributions are plotted as curves; distributions containing greater than 3 parameters (e.g. Kappa and Wakeby) are not defined on this plot. The closeness of a data point for an individual site to a particular distribution’s point or curve is one method that can initially be used to determine if a particular distribution describes the site data well. This is only a preliminary indication; further analyses are required to determine the distribution that best describes the data for a particular site.