#        mass          pdf          cdf
        22.72            0            0
        22.76            0            0
         22.8            0            0
        22.84            0            0
        22.88            0            0
        22.92            0            0
        22.96            0            0
           23            0            0
        23.04            0            0
        23.08            0            0
        23.12            0            0
        23.16            0            0
         23.2           25            1
        23.24            0            1
        23.28            0            1
        23.32            0            1
        23.36            0            1
         23.4            0            1
        23.44            0            1
        23.48            0            1
        23.52            0            1
        23.56            0            1
         23.6            0            1
        23.64            0            1
        23.68            0            1