In this paper, we analyze the variation of Whole Body Specific Absorption Rate (WBSAR) induced in Visible Human by five plane waves with random direction of azimuth angles, amplitudes and phases. A new and fast numerical method presented in a first paper  is used to perform this study. Considering a finite set of 36 azimuth angles, the Latin Hypercube Sampling is used to design an experiment plan. Two distributions of amplitudes are used to design the plan and the different results of WBSAR for each case are compared. The response Y (WBSAR) is modeled as a combination of input parameters influencing the exposure. Using input parameters, the azimuth angles described by the surface projected and the WBSAR, a regression estimates the model coefficients. The influence of inputs variables of the function is analyzed.