MTB > read 'a:\ed257\mlapair.dat' c1 c2
      20 ROWS READ
 
  ROW    C1    C2
 
    1    32    34
    2    31    31
    3    29    35
    4    10    16
   .  .  .
 
 MTB > describe c1-c2
 
                 N     MEAN   MEDIAN   TRMEAN    STDEV   SEMEAN
 C1             20    25.80    27.00    26.28     6.30     1.41
 C2             20    28.30    27.50    28.61     5.95     1.33
 
               MIN      MAX       Q1       Q3
 C1          10.00    33.00    22.25    31.00
 C2          15.00    36.00    26.00    33.75
 
 MTB > let c3 = c2 - c1
 MTB > sinterval 95 c3
 
 SIGN CONFIDENCE INTERVAL FOR MEDIAN
 
                              ACHIEVED
                N   MEDIAN   CONFIDENCE    CONFIDENCE INTERVAL   POSITION
 C3            20    3.000     0.8847      (   2.000,   3.000)          7
                               0.9500      (   1.235,   3.000)        NLI
                               0.9586      (   1.000,   3.000)          6
 
 MTB > NOTE compare with paired t interval 90% (1.38, 3.62)
 MTB > stest 0 c3
 
 SIGN TEST OF MEDIAN = 0.00000 VERSUS  N.E.  0.00000
 
                N  BELOW  EQUAL  ABOVE   P-VALUE     MEDIAN
 C3            20      1      3     16    0.0003      3.000
 
 MTB > cdf 15;
 SUBC> binomial 17 .5.
        K  P( X LESS OR = K)
     15.00            0.9999
 MTB > cdf 15;
 SUBC> binomial 20 .5.
        K  P( X LESS OR = K)
     15.00            0.9941
 MTB > sort c3 c4
 
 MTB > print c4
 
 C4      
   -6    0    0    0    1    1    2    2    2    3    3    3    3    3    3 
    6    6    6    6    6 
 
 MTB > wtest c3
 
 TEST OF MEDIAN = 0.000000 VERSUS MEDIAN N.E. 0.000000
 
                 N FOR   WILCOXON           ESTIMATED
              N   TEST  STATISTIC  P-VALUE     MEDIAN
 C3          20     17      138.5    0.004      3.000
 MTB > winterval 95 c3
 
                 ESTIMATED    ACHIEVED
              N     MEDIAN  CONFIDENCE  CONFIDENCE INTERVAL
 C3          20       3.00        95.0  (    1.50,    4.00)
 NOTE *** Data Editor entered at this point.
 MTB > erase c1-c4
 NOTE *** The Data Editor has changed the worksheet
 MTB > write 'a:\ed257\oxygen.dat' c1-c2
 * NOTE  * Column lengths not equal
 
 NOTE *** The Data Editor has changed the worksheet
 MTB > write 'a:\ed257\oxygen.dat' c1-c2
 MTB > dotplot c1-c2; 
 SUBC> same.
 
                                        .
                                  .     :     .  . .  .  .  :     .
          +---------+---------+---------+---------+---------+-------C1      
 
           .  .  .     :  .  : .     :     .
          +---------+---------+---------+---------+---------+-------C2      
      10.15     10.50     10.85     11.20     11.55     11.90
 
 
 MTB > sort c1 c3
 MTB > sort c2 c4
 MTB > print c3 c4 
 
  ROW     C3     C4
 
    1   11.0   10.2
    2   11.2   10.3
    3   11.2   10.4
    4   11.2   10.6
    5   11.4   10.6
    6   11.5   10.7
    7   11.6   10.8
    8   11.7   10.8
    9   11.8   10.9
   10   11.9   11.1
   11   11.9   11.1
   12   12.1   11.3
 
 MTB > mann-whitney c1 c2
 
 Mann-Whitney Confidence Interval and Test
 
 C1         N =  12     Median =      11.550
 C2         N =  12     Median =      10.750
 Point estimate for ETA1-ETA2 is       0.800
 95.4 pct c.i. for ETA1-ETA2 is (0.500,1.100)
 W = 216.0
 Test of ETA1 = ETA2  vs.  ETA1 n.e. ETA2 is significant at 0.0002
 The test is significant at 0.0002 (adjusted for ties)
 
 MTB > twosample c1 c2
 
 TWOSAMPLE T FOR C1 VS C2
      N      MEAN     STDEV   SE MEAN
 C1  12    11.542     0.348      0.10
 C2  12    10.733     0.337     0.097
 
 95 PCT CI FOR MU C1 - MU C2: (0.52, 1.099)
 
 TTEST MU C1 = MU C2 (VS NE): T= 5.79  P=0.0000  DF=  21
 
 
 MTB > Stop
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