Monte Carlo GUM Supplement 2 marginal distributions. In (a) the probability density function distribution for the continuous random variable of the zero-pressure area is visualized. In (b) the probability density function distribution for the continuous random variable ξ_λ of the distortion coefficient is visualized. In (c) the underlying discrete data from the GUM Supplement 2 analysis that is used to build the PDF for the zero-pressure area is shown. In (d) the underlying discrete data from the GUM Supplement 2 analysis that is used to build the PDF for the distortion coefficient is shown