MTB > read 'huitema.dat' c1-c6
     30 ROWS READ

 ROW    C1    C2   C3   C4   C5   C6

   1    15    29    3    1    0    1
   2    19    49    3    1    0    1
   3    21    48    2    1    0    1
   4    27    35    5    1    0    1
  .  .  .

MTB > desc c1-c3;
SUBC> by c6.

               C6        N     MEAN   MEDIAN   TRMEAN    STDEV   SEMEAN
C1              1       10    30.00    30.00    29.38    10.87     3.44
                2       10    39.00    41.00    39.50     9.98     3.16
                3       10    36.00    36.00    36.25    13.23     4.18
C2              1       10    52.00    48.50    52.13    14.96     4.73
                2       10    47.00    50.50    48.00    14.13     4.47
                3       10    49.00    46.50    47.37    14.48     4.58
C3              1       10    5.100    5.000    5.000    2.378    0.752
                2       10    4.800    4.500    4.750    1.814    0.573
                3       10    5.100    4.500    5.125    2.767    0.875

               C6      MIN      MAX       Q1       Q3
C1              1    15.00    50.00    20.50    38.25
                2    20.00    54.00    32.50    46.25
                3    14.00    56.00    27.50    45.00
C2              1    29.00    74.00    43.25    68.25
                2    22.00    64.00    38.25    56.50
                3    33.00    78.00    35.75    58.50
C3              1    2.000    9.000    3.000    7.250
                2    2.000    8.000    3.750    6.250
                3    1.000    9.000    2.750    8.000

MTB > ancova c1=c6

Factor   Levels Values
C6            3     1     2     3

Analysis of Variance for C1      

Source      DF         SS         MS       F      P
C6           2      420.0      210.0    1.60  0.220
Error       27     3536.0      131.0
Total       29     3956.0 

MTB > oneway c1 c6
ANALYSIS OF VARIANCE ON C1      
SOURCE     DF        SS        MS        F        p
C6          2       420       210     1.60    0.220
ERROR      27      3536       131
TOTAL      29      3956
                                   INDIVIDUAL 95 PCT CI'S FOR MEAN
                                   BASED ON POOLED STDEV
 LEVEL      N      MEAN     STDEV  --------+---------+---------+--------
     1     10     30.00     10.87  (----------*---------) 
     2     10     39.00      9.98               (----------*---------) 
     3     10     36.00     13.23           (---------*----------) 
                                   --------+---------+---------+--------
POOLED STDEV =    11.44                 28.0      35.0      42.0
MTB > ancova c1 = c6;
SUBC> covariates c2 c3.

Factor   Levels Values
C6            3     1     2     3

Analysis of Covariance for C1      

Source      DF     ADJ SS         MS       F      P
Covariates   2    2563.56    1281.78   32.95  0.000
C6           2     624.74     312.37    8.03  0.002
Error       25     972.44      38.90
Total       29    3956.00 

Covariate     Coeff     Stdev   t-value         P
C2           0.2766     0.108     2.571     0.016
C3           2.8349     0.664     4.267     0.000

MTB > regress c1 4 c4 c5 c2 c3

The regression equation is
C1 = 7.99 - 6.83 C4 + 4.40 C5 + 0.277 C2 + 2.83 C3

Predictor       Coef       Stdev    t-ratio        p
Constant       7.989       4.503       1.77    0.088
C4            -6.830       2.808      -2.43    0.022
C5             4.404       2.795       1.58    0.128
C2            0.2766      0.1076       2.57    0.016
C3            2.8349      0.6644       4.27    0.000

s = 6.237       R-sq = 75.4%     R-sq(adj) = 71.5%

Analysis of Variance

SOURCE       DF          SS          MS         F        p
Regression    4     2983.56      745.89     19.18    0.000
Error        25      972.44       38.90
Total        29     3956.00

SOURCE       DF      SEQ SS
C4            1      375.00
C5            1       45.00
C2            1     1855.35
C3            1      708.21

Unusual Observations
Obs.      C4        C1       Fit Stdev.Fit  Residual   St.Resid
 20     0.00     54.00     41.50      2.08     12.50      2.13R 

R denotes an obs. with a large st. resid.

MTB > regress c1 2 c2 c3

The regression equation is
C1 = 9.60 + 0.212 C2 + 2.99 C3

Predictor       Coef       Stdev    t-ratio        p
Constant       9.602       5.166       1.86    0.074
C2            0.2119      0.1311       1.62    0.118
C3            2.9884      0.8170       3.66    0.001

s = 7.691       R-sq = 59.6%     R-sq(adj) = 56.6%

Analysis of Variance

SOURCE       DF          SS          MS         F        p
Regression    2      2358.8      1179.4     19.94    0.000
Error        27      1597.2        59.2
Total        29      3956.0

SOURCE       DF      SEQ SS
C2            1      1567.4
C3            1       791.5

Unusual Observations
Obs.      C2        C1       Fit Stdev.Fit  Residual   St.Resid
 20     54.0     54.00     35.99      1.53     18.01      2.39R 

R denotes an obs. with a large st. resid.


