  We investigate pairing in a strongly interacting two-component Fermi gas with
positive scattering length. In this regime, pairing occurs at temperatures
above the superfluid critical temperature; unbound fermions and pairs coexist
in thermal equilibrium. Measuring the total number of these fermion pairs in
the gas we systematically investigate the phases in the sectors of pseudogap
and preformed-pair. Our measurements quantitatively test predictions from two
theoretical models. Interestingly, we find that already a model based on
classical atom-molecule equilibrium describes our data quite well.
