Information Technology Reference
In-Depth Information
A. Estimates
Measure: MEASURE_1
95% Confidence Interval
powcolor
1
granules
1
boxcolor
1
2
1
2
1
2
1
2
1
2
1
2
Mean
Std.Error
Lower Bound
Upper Bound
6.500
.315
5.690
7.310
4.000
.274
3.294
4.706
2
2.700
.347
1.807
3.593
3.200
.346
2.310
4.090
2
1
2.100
.219
1.537
2.663
2.000
.165
1.575
2.425
2
2.200
.202
1.682
2.718
2.333
.293
1.580
3.086
3
1
4.500
.384
3.513
5.487
5.000
.301
4.226
5.774
2
3.567
.316
2.755
4.379
These are the probabilities
of the differences
occurring by chance alone
for the pairwise
comparisons with powder
color as the first order.
6.700
.231
6.106
7.294
B. Pairwise Comparisons
Measure: MEASURE_1
95% Confidence Interval for
Difference
a
Mean
Difference
(I-J)
Sig.
a
powcolor
1
boxcolor
1
(I) granules
1
2
1
2
1
2
1
2
1
2
1
2
(J) granules
2
1
2
1
2
1
2
1
2
1
2
1
Std. Error
Lower Bound
Upper Bound
3.800*
.497
.001
2.523
5.077
-3.800*
.497
.001
-5.077
-2.523
2
.800*
.139
.002
.443
1.157
-.800*
.139
.002
-1.157
-.443
2
1
-.100*
.026
.012
-.166
-.034
.100*
.026
.012
.034
.166
2
-.333*
.128
.048
-.663
-.004
.333*
.128
.048
.004
.663
3
1
.933
.695
.237
-.853
2.720
-.933
.695
.237
-2.720
.853
2
-1.700*
.163
.000
-2.120
-1.280
1.700*
.163
.000
1.280
2.120
Based on estimated marginal means
*.The mean difference is significant at the .05 level.
a. Adjustment for multiple comparisons: Bonferroni.
Figure 12.18 Powcolor
by
boxcolor
by
granules
pairwise comparisons.
12.9 SPSS OUTPUT FOR THE POST-ANOVA ANALYSIS
12.9.1 INTERACTION SIMPLE EFFECTS
Simple effects analyses are best grounded in the graph of the interaction.
In this way, we can see exactly what is analyzed here. Use Figure 12.2 as
your base for interpreting what we find here.
Figure 12.18 presents the
estimated marginal means
, shown as
Esti-
mates
, matched to the
PairwiseComparisons
table for
granules
. Note that
the two tables are structured exactly the same with
granules
incrementing
most rapidly and
powcolor
incrementing most slowly.
Most of the comparisons are statistically significant. Note that there
are three main rows, each isolating one of the levels of
powcolor
.Inside
each major row, we see separate rows for each level of
boxcolor
.Within
each level of
boxcolor
the two levels of
granules
are compared. If we look
attheveryfirstcomparisonatthetopofthetable,weseethatitisfor
