Figure 2.

Comparing standard deviation estimates used by Kaul et Wolf ($\widehat{o}/\sqrt{n_t}$, in red) and those of the prevalence distribution B(n_t,p_t)/n_t derived from the binomial distribution, ($\sqrt{p_t\left(1-p_t\right)/n_t}$, in blue) taking p_t on the trend line, i.e. p_t = 0.1147 – 0.00037·t