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
6.700
.231
6.106
7.294
These are the probabilities
of the differences
occurring by chance alone
for the pairwise
comparisons with powder
color as the first order.
B. Pairwise Comparisons
Measure: MEASURE_1
Mean
Difference
(I-J)
95% Confidence
Interval fo
Difference
a
Sig.
a
powcolor
1
granules
1
(I) boxcolor
1
2
1
2
1
2
1
2
1
2
1
2
(J) boxcolor
2
1
2
1
2
1
2
1
2
1
2
1
Upper Bound
Std. Error
Lower Bound
2.500*
.465
.003
1.305
3.695
-2.500*
.465
.003
-3.695
-1.305
2
-.500*
.093
.003
-.739
-.261
.500*
.093
.003
.261
.739
2
1
.100
.384
.805
-.887
1.087
-.100
.384
.805
-1.087
.887
2
-.133
.494
.798
-1.404
1.138
.133
.494
.798
-1.138
1.404
3
1
-.500
.678
.494
-2.242
1.242
.500
.678
.494
-1.242
2.242
2
-3.133*
.158
.000
-3.541
-2.726
3.133*
.158
.000
2.726
3.541
Based on estimated marginal means
*. The mean difference is significant at the .05 level.
a. Adjustment for multiple comparisons: Bonferroni.
Figure 12.19 Powcolor
by
granules
by
boxcolor
pairwise comparisons.
the white powder
(powcolor 1)
in the aqua box
(boxcolor 1)
comparing
the two granule conditions. The two means, shown in the
estimated
marginal means
table, are 6.5 and 2.7, a difference we see in the
Pairwise
Comparisons
table of 3.8 with a standard error of 0.4967. That difference
is statistically significant (
p
.001).
Figure 12.19 presents the
estimated marginal means
, shown as
Esti-
mates
, and the
Pairwise Comparisons
table for
boxcolor
. Note here that
once again the two tables are in synchrony. This time
boxcolor
incre-
ments most rapidly thanks to our reordering of the variables in parenthe-
ses following the
/EMMEANS
=
TABLES
subcommand.
Powcolor
still
increments most slowly since it was placed first in the list.
All of the comparisons for the white powder are significant and none for
the green powder are significant. For the blue powder, only the comparison
for the absence of granules between box colors is significant.
=
