Fig. 3.

QQ plots of SW and SBS distributions for DS2 (from left to right), whose coefficients of determination were $\approx 0.98$ and $\approx 0.99$, respectively. Again, this shows that the SBS can also be considered as a good candidate to fit RT data. For this case, the maximum likelihood estimators were $\widehat{\alpha }\approx 0.60,\widehat{\beta }\approx 215.88$ and $\widehat{\theta }\approx 493$