Vector x contains the expenditure of 20 customers in a supermarket. (See page 178 of [MRZ])

x=[20, 110,  31, 125,  40, 128,  50, 140,  65, 150,  72, 175,...
85, 190,  100, 205,  100, 230,  105 310];
GUIskewness(x)

ans =

  21×5 table

     i     x_i     (x_i-M)    (x_i-M)^2      (x_i-M)^3 
    ___    ____    _______    __________    ___________

      1      20    -101.55         10312    -1.0472e+06
      2     110     -11.55         133.4        -1540.8
      3      31     -90.55        8199.3    -7.4245e+05
      4     125       3.45        11.903         41.064
      5      40     -81.55        6650.4    -5.4234e+05
      6     128       6.45        41.603         268.34
      7      50     -71.55        5119.4    -3.6629e+05
      8     140      18.45         340.4         6280.4
      9      65     -56.55        3197.9    -1.8084e+05
     10     150      28.45         809.4          23028
     11      72     -49.55        2455.2    -1.2166e+05
     12     175      53.45        2856.9      1.527e+05
     13      85     -36.55        1335.9         -48827
     14     190      68.45        4685.4     3.2072e+05
     15     100     -21.55         464.4         -10008
     16     205      83.45        6963.9     5.8114e+05
     17     100     -21.55         464.4         -10008
     18     230     108.45         11761     1.2755e+06
     19     105     -16.55         273.9        -4533.1
     20     310     188.45         35513     6.6925e+06
    NaN    2431          0    1.0159e+05     5.9765e+06

Vector x contains the expenditure of 20 customers in a supermarket. (See page 178 of [MRZ])

x=[20, 110,  31, 125,  40, 128,  50, 140,  65, 150,  72, 175,...
85, 190,  100, 205,  100, 230,  105 310];
GUIskewness(x,0)

Italian grades obtained in a particular university exam by 1000 students. (See page 54 of [CMR])

x=20:29;
% w= vector of frequencies
w=[61    82   102   164   122   122    61   143    82    61];
GUIskewness(x,0,w)