DATA FROM M&M P.543  TABLE 8.2 TREATMENT IN C1 CONTROL IN C2
 MTB > describe c1-c2
 
                 N     MEAN   MEDIAN   TRMEAN    STDEV   SEMEAN
 C1             21    51.48    53.00    51.89    11.01     2.40
 C2             23    41.52    42.00    40.95    17.15     3.58
 
               MIN      MAX       Q1       Q3
 C1          24.00    71.00    43.50    58.50
 C2          10.00    85.00    28.00    54.00
 
 MTB > dotplot c1-c2; 
 SUBC> same.
 
                                   :
                      .     .      : . : :..:: :   . .
           -----+---------+---------+---------+---------+---------+-C1      
                                  .
             .   . :   . .  .  : .:. ..  ..:  ..               .
           -----+---------+---------+---------+---------+---------+-C2      
               15        30        45        60        75        90
 
 MTB > twosample c1 c2 
 
 TWOSAMPLE T FOR C1 VS C2
      N      MEAN     STDEV   SE MEAN
 C1  21      51.5      11.0       2.4
 C2  23      41.5      17.1       3.6
 
 95 PCT CI FOR MU C1 - MU C2: (1.2, 18.7)
 
 TTEST MU C1 = MU C2 (VS NE): T= 2.31  P=0.027  DF=  37
 
 MTB > twosample 99 c1 c2
 
 TWOSAMPLE T FOR C1 VS C2
      N      MEAN     STDEV   SE MEAN
 C1  21      51.5      11.0       2.4
 C2  23      41.5      17.1       3.6
 
 99 PCT CI FOR MU C1 - MU C2: (-1.7, 21.7)
 
 TTEST MU C1 = MU C2 (VS NE): T= 2.31  P=0.027  DF=  37
 
 
 MTB > stack c1 c2 c3;
 SUBC> subscripts c4.
 MTB > print c3 c4
 
  ROW    C3   C4
 
    1    24    1
    2    43    1
    3    58    1
    4    71    1
    5    43    1
deleted cases
   20    43    1
   21    57    1
   22    42    2
   23    43    2
   24    55    2
deleted cases
   43    28    2
   44    48    2
 
 MTB > describe c3;
 SUBC> by c4.
 
                C4        N     MEAN   MEDIAN   TRMEAN    STDEV   SEMEAN
 C3              1       21    51.48    53.00    51.89    11.01     2.40
                 2       23    41.52    42.00    40.95    17.15     3.58
 
                C4      MIN      MAX       Q1       Q3
 C3              1    24.00    71.00    43.50    58.50
                 2    10.00    85.00    28.00    54.00
 
 MTB > twot c3 c4
 
 TWOSAMPLE T FOR C3
 C4   N      MEAN     STDEV   SE MEAN
 1   21      51.5      11.0       2.4
 2   23      41.5      17.1       3.6
 
 95 PCT CI FOR MU 1 - MU 2: (1.2, 18.7)
 
 TTEST MU 1 = MU 2 (VS NE): T= 2.31  P=0.027  DF=  37
 
