Distribution of group sizes for all observations.

<p>Comparison of the empirical data (x) with N_mean = 2.9 and = 7.3, a power law (dotted line) with α = 2.42, geometric distribution (dashed line) with p = 0.35, logarithmic distribution (solid line) with = 6.4, truncated power law by MLE (almost congruent with the line for logarithmic distribution and thus not displayed) with a = 0.99, c = 0.84 and truncated power law by minimizing χ² value (red line) with a = 1.45, c = 0.91 on a semi-log (A) and a log-log plot (B). Number of observations: <i>n</i> = 6070.