  I present comprehensive analyses of the viable parameter regions of the
Standard Model of particle physics and two of its extensions: the Standard
Model with four fermion generations and the Two-Higgs-Doublets model of type
II. Applying frequentist methods, I have performed global fits which show that
the Standard Model is compatible with electroweak precision data and the
measured Higgs signal strengths. The Standard Model with four generations is
excluded by the experimental results with a p-value corresponding to more than
five standard deviations. In the Two-Higgs-Doublets model of type II, the fit
prefers the decoupling limit where it mimics the Standard Model; however,
neutral heavy Higgs boson masses below 200 GeV are still allowed.
