This method was applied using the 11 fission cross section ratio **data** sets specified in Table III Table VI reports for each **data** set i the average relative uncertainties derived from the ratio of the uncertainty and the best estimate for each of the three energy groups. The average values derived from the reported total uncertainties, and the uncertainties due to systematic and random effects are compared with the values derived from the statistical analysis method proposed by Badikov et al. [35]. The results in Table VI confirm the conclusions based on Eqs. (19) and (20) that the uncertainties due to systematic effects reported by Toveson et al. [85], Behrens et al. [87], Cierjacks et al. [89] and Lisowski et al. [92] might be underestimated. In addition, there is an indication that the uncertainties due to random effects reported for the n TOF **data** (2) [86] and the **data** of Cierjacks et al. [89] are overestimated, while those of Difilippo et al. [88] and Tovesson et al. [85] are underestimated.