Distribution of observed values of wind parameters for the presumed single stars in our sample for which we obtain good fits (see text). From left to right, top to bottom, we show the clumping factor, the interclump density factor, the velocity-porosity, the wind turbulence, and the onset velocity and radius of clumping. Each distribution peaks around a certain value, except for the distribution of the velocity-porosity, which is more or less flat for f_vel ≳ 0.4. See also Table 7.