We report a statistical approach of analyzing experimental data on three stages of passive compensations of light State of Polarization (SOP) in standard single mode optical fiber. Fidelity of every basic six SOPs which consist of two pairs of linear state of polarization and a pair of circular state of polarization were also analyzed by performing an experiment to measure the Stoke parameter of every state. Experimental results have shown that all six basic SOPs were maintained according to the state of the source at every stage of respective paths. These observations were regardless of different optical fiber length at the second stage of passive compensation. We achieved to ensure that the final destination of SOP will have similar state with its source at fidelity of above 96%.