The recent precision electroweak data on GAMMA(l), s(W)2BAR and M(W)/M
(Z) are compared with the tree-level and the dominant-fermion-loop as
well as the full one-loop standard-model predictions. While the tree-l
evel predictions are ruled out, the dominant-fermion-loop predictions,
defined by using alpha(M(Z)2) congruent-to 1/128.9 in the tree-level
formulae, as well as the full one-loop predictions are consistent with
the experimental data. Deviations from the dominant-fermion-loop pred
ictions are quantified in terms of an effective Lagrangian containing
three additional parameters which have a simple meaning in terms of SU
(2) symmetry violation. The effective Lagrangian yields the standard o
ne-loop predictions for specific values of these parameters, which are
determined by m(t) and M(H)