Fig 4. Empirical cumulative distributions of the Sanson et al. [36] sequences ensemble.

Vertical dotted line indicates the mean value. Panels (a) and (b) display the empirical cumulative distribution of the observed data from ensemble of trees against the expected cumulative Poisson distribution with mean branch length λ = 5.75 and the empirical cumulative distribution of the observed data from the real tree against the expected cumulative Poisson distribution with mean branch length λ = 5.36, respectively.