Cram´er-von Mises (denoted as W2) statistic belongs to the Cram´er-von Mises family (equation (15)) with the weight function ψ(Fc∗(x)) = 1. Let {X(j)}1≤j≤n be the vector of the order statistics, such that 8X(1) ≤ X(2) ≤ ... ≤ X(n). The computing formula for the statistic for the left-truncated samples becomes (the derivation is given in Appendix)