Information Technology Reference
In-Depth Information
These are the
p
-values for
the main effects and
covariate effect.
Tests of Between-Subjects Effects
Dependent Variable: MATH_DV
Type III Sum
of Squares
Source
Corrected Model
Intercept
VERB_COV
GROUP
Error
Total
Corrected Total
df
Mean Square
F
Sig.
a
3
1
1
2
32
36
35
a. R Squared
=
.735 (Adjusted R Squared
=
.710)
125.620
169.433
123.898
13.029
45.352
4549.000
170.972
41.873
169.433
123.898
6.515
1.417
29.546
119.551
87.422
4.597
.000
.000
.000
.018
Figure 16.17
The summary table for the ANCOVA.
Estimates
Dependent Variable: MATH_DV
95% Confidence
Interval
Lower
Bound
Upper
Bound
GROUP
Mean
Std. Error
1
2
3
a
a
a
.350
.345
.346
10.202
11.195
11.687
9.488
10.492
10.983
10.915
11.897
12.391
a. Evaluated at covariates appeared in the
model: VERB_COV
=
5.39.
These are the probabilities of the
differences occurring by chance
alone for the pairwise comparisons.
Pairwise Comparisons
Dependent Variable: MATH_DV
95% Confidence
Interval for
Difference
a
Mean
Difference
(I-J)
Lower
Bound
Upper
Bound
Sig.
a
(I) GROUP
(J) GROUP
Std. Error
1
2
3
1
3
1
2
.496
.497
.496
.486
.497
.486
−
.993
−
1.485
.993
−
.492
1.485
.492
.161
.016
.161
.956
.016
.956
−
2.245
−
2.742
−
.260
−
1.720
.229
−
.736
.260
−
.229
2.245
.736
2.742
1.720
*
2
3
*
Based on estimated marginal means
*. The mean difference is significant at the .05 level.
a. Adjustment for multiple comparisons: Bonferroni.
Figure 16.18
Bonferroni pairwise comparisons.
