10000 Obs Sample from a Normal Distribution          3
             with Mean=50 and Standard Deviation=10

              Frequency

                  |              *
              800 +              ***
                  |              ****
                  |             ******
                  |            *******
              600 +            *******
                  |           **********
                  |          ***********
                  |          ***********
              400 +          ************
                  |         *************
                  |        ***************
                  |       *****************
              200 +       ******************
                  |      *******************
                  |    **********************
                  |  ***************************
                  --------------------------------
                   2    3    4    5    6    7    8
                   0    0    0    0    0    0    0

                   3    2    1    M    1    2    3
                   *    *    *    e    *    *    *
                   S    S    S    a    S    S    S
                   t    t    t    n    t    t    t
                   d    d    d         d    d    d

                             X Midpoint