  The parameters of the nuclear energy density have to be adjusted to
experimental data. As a result they carry certain uncertainty which then
propagates to calculated values of observables. In the present work we quantify
the statistical uncertainties of binding energies, proton quadrupole moments,
and proton matter radius for three UNEDF Skyrme energy density functionals by
taking advantage of the knowledge of the model parameter uncertainties. We find
that the uncertainty of UNEDF models increases rapidly when going towards
proton or neutron rich nuclei. We also investigate the impact of each model
parameter on the total error budget.
