This thesis describes the t-tbar production cross section measurement, in the b-tagged SECVTX lepton+jets channel, during Run II at CDF. The total data sample size used in this analysis is 107.9 pb^-1 Posted to /cdf/pub/thesis/cdf6892_hray_thesis.ps.gz http://www-cdf.fnal.gov/thesis/cdf6892_hray_thesis.ps.gz Posted by hray@cdfsga