  We evaluate uncertainty of peak energy of giant dipole resonance (GDR),
propagated from uncertainty of parameters of Skyrme interaction. The Monte
Carlo calculation of the random phase approximation using randomized Skyrme
parameters is performed. Under the condition that the correlations between each
of the Skyrme parameters is considered, the GDR peak energy has the uncertainty
of $\sim$ 1 MeV irrespective of nuclear mass and is strongly correlated with
the Skyrme parameters, in present calculations. This serves a guide for a new
parametrization of effective interactions.
