Distribution of random choices of parameters around the χ ² minimum found by MINIM with respect to a generic specified RD model. The extension of the distribution is Δχ ² = 1 corresponding to the 67% confidence interval around the minimum (see Section 3). More elongated ellipsoids indicate stronger correlation between the parameters. A filled circle shows the position of the initial model. For the definition of the fitting parameters plotted here please see Appendix A.1.