2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179226Standard Model fits are performed on the most recent leptonic and b quark Z decay data from LEP and SLD, and FERMILAB data on top quark production, to obtain $m_t$ and $m_H$. Poor fits are obtained, with confidence levels $\simeq$ 2%. Removing the b quark data improves markedly the quality of the fits and reduces the 95% CL upper limit on $m_H$ by $\simeq$ 50 GeV.6 pages 3 tables i figureHigh Energy Physics - Phenomenologytext