NOTE C1-C2 are Xi-values, C3-C4 X-values
C11-C14 are rounded C1-C4

                N     MEAN   MEDIAN   TRMEAN    STDEV   SEMEAN
C1             15    41.24    42.37    41.58     7.05     1.82
C2             15    63.04    63.33    63.27    15.72     4.06
C3             15    43.08    41.97    43.14     8.94     2.31
C4             15    63.30    69.02    64.25    15.88     4.10

              MIN      MAX       Q1       Q3
C1          27.02    51.06    35.43    47.38
C2          36.49    86.68    46.52    76.04
C3          29.05    56.36    35.04    51.05
C4          31.12    83.13    51.35    77.66

MTB > let c11 = Round(100*c1)/100
MTB > let c12 = Round(100*c2)/100
MTB > let c13 = Round(100*c3)/100
MTB > let c14 = Round(100*c4)/100
MTB > describe c11-c14

                N     MEAN   MEDIAN   TRMEAN    STDEV   SEMEAN
C11            15    41.24    42.37    41.58     7.05     1.82
C12            15    63.04    63.33    63.27    15.72     4.06
C13            15    43.08    41.97    43.14     8.94     2.31
C14            15    63.30    69.02    64.25    15.88     4.10

              MIN      MAX       Q1       Q3
C11         27.02    51.06    35.43    47.38
C12         36.49    86.68    46.52    76.04
C13         29.05    56.36    35.04    51.05
C14         31.12    83.13    51.35    77.66

MTB > print c11-c14


 ROW     C11     C12     C13     C14

   1   41.93   57.27   40.11   54.88
   2   27.02   36.49   29.05   40.23
   3   42.37   70.52   41.15   73.72
   4   47.82   73.36   52.09   72.19
   5   41.02   54.89   41.97   62.37
   6   51.06   86.68   50.67   82.19
   7   44.81   63.33   47.36   69.74
   8   47.38   80.69   48.70   83.13
   9   30.68   46.52   35.04   51.35
  10   31.93   41.15   31.24   49.51
  11   42.53   76.04   51.05   69.02
  12   45.50   61.40   51.97   53.52
  13   35.43   44.59   29.40   31.12
  14   40.91   75.20   40.05   78.89
  15   48.28   77.50   56.36   77.66

MTB > corr c11-c14

            C11      C12      C13
C12       0.894
C13       0.903    0.836
C14       0.783    0.921    0.752

MTB > corr c1-c4

             C1       C2       C3
C2        0.894
C3        0.903    0.836
C4        0.783    0.921    0.751

MTB > 
