Fig. 5.

The correction factor is plotted versus the CoV of distributions A and B when A and B are both described by Weibull distributions with means $1/a$ and $1/b$, respectively. The panels illustrate cases when the ratio of means changes: $b/a=1$ (top panel), $b/a>1$ (middle panel). Note that the correction factor determined when $b<a$ is symmetric to the case when $b>a$. In the bottom panel we plot the correction factor when A and B have similar shapes for different ratios of $b/a$.