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Figure 11.32
The
Least Squares Post Hoc Tests
window.
conclusions from the analysis. Thus, we determine that both
drinks
and
the
drinks
∗
vehicle
interaction were statistically significant.
11.13 PERFORMING THE SIMPLE EFFECTS ANALYSIS IN SAS
To perform the simple effects analysis in
SAS Enterprise Guide
, configure
the analysis as shown above. Then in the
Least Squares Post Hoc Tests
screen shown in Figure 11.32, in the
Effects touse
frame, set the interaction
to
True
and all others to
False
. Then in the
Comparisons
frame, set
Show
p-values for differences
to
All pairwise differences
and set
Adjustment
methodfor comparison
to
Bonferroni
.Click
Run
to perform the analysis.
11.14 SAS OUTPUT FROM THE SIMPLE EFFECTS ANALYSIS
The pairwise mean comparisons are shown in Figure 11.33. The condi-
tions that are being compared are specified in the table in the following
form. The first two coded columns denote the mean of the first condition
of the pair and the next two coded columns denote the second condition
of the pair that is subtracted from the first. To illustrate, consider the first
row in the
Differences of Least Squares Means
table. This takes the form
“first condition” minus “second condition.” The first condition is the
