The simulation summary (left of Figure 242) gives you a quick access to the mean, median and standard deviation of the dRSS, iRSS unwanted and iRSSblocking
The mean is computed using the simulated results in dB. The median is computed using the simulated results converted to linear value and then the median is expressed in dB. The standard deviation (StdDev) is computed using the simulated results in dB. This is discussed in Annex A1.5.1