(Colour online) The yield uncertainties computed from 3 of the parametrisation schemes investigated here compared to the individually sampled reaction rates. The final abundances for four nuclei are considered for each reaction under investigation here. Each group of vertical bars for each nucleus represents, from left to right, the abundances calculated using: (i) the “optimum” reaction rate samples; (ii) the full parametrisation; (iii) the unphysical, random, case; and (iv) constant values of p(T) = a.