1. A method, comprising: generating, using a processor, an approximation of a quantile distribution function by connecting a pair of adjacent quantile points using linear interpolation; wherein the pair of adjacent quantile points comprises: a first quantile point having a first quantile estimate and a first probability associated therewith; and a second quantile point having a second quantile estimate and a second probability associated therewith; and wherein generating the approximation of the quantile distribution function comprises: defining a right quantile point to the right of the first quantile point in the quantile distribution function; defining a left quantile point to the left of the second quantile point in the quantile distribution function; and connecting the first quantile point, the right quantile point, the left quantile point, and the second quantile point using linear interpolation.