Generate a random sample of size 10

                    OBS    NAME        ID       X
                      1    Indigo       1    0.28262
                      2    Patricia     2    0.79205
                      3    Peter        3    0.77852
                      4    Paul         4    0.21901
                      5    Ralph        5    0.90440
                      6    John         6    0.19270
                      7    Joe          7    0.35947
                      8    Ed           8    0.85168
                      9    Pat          9    0.24305
                     10    Albert      10    0.98226
                     11    Louise      11    0.12623
                     12    Maria       12    0.86401
                     13    Brigitte    13    0.16522
                     14    Fred        14    0.71162
                     15    Annie       15    0.38930

                  Generate a random sample of size 10

                    OBS    NAME        ID       X
                      1    Louise      11    0.12623
                      2    Brigitte    13    0.16522
                      3    John         6    0.19270
                      4    Paul         4    0.21901
                      5    Pat          9    0.24305
                      6    Indigo       1    0.28262
                      7    Joe          7    0.35947
                      8    Annie       15    0.38930
                      9    Fred        14    0.71162
                     10    Peter        3    0.77852