This paper is dedicated to the statistical analysis of the chaos, generated by Rössler attractor, based on the socalled
“Degenerated Cumulant Equations” method. The approach is illustrated by the calculus of the first cumulants,
which are necessary to create an approximation of the Probability Density Function (PDF), applying the Gramm-Charlier
series, the model distribution method, etc. An approximate method for the variance calculation at the output of the Rössler
strange attractor is presented as well. The latter is based on the Kolmogorov-Sinai entropy estimated by the Lyapunov
exponents for a statistically linearized chaotic system. Finally, an application using Rössler attractor output signals to
model Radio Frequency Interferences (RFI) provided by Peripherical Component Interface express (PCIe) serial bus of
high speed interconnects of Laptops and Desktops is presented.