Basic Analysis and Graphing - SAS

Chapter 5 Performing Oneway Analysis 149
Compare Means
Figure 5.13 Highlighting Comparison Circles
Groups that are different
from the selected group
appear as thick gray
circles.
Groups that are not
different from the
selected group appear
as thin red circles.
The selected group
appears as a thick red
circle.
Related Information
• “Statistical Details for Comparison Circles” on page 179
Each Pair, Student’s t
The Each Pair, Student’s t test shows the Student’s t-test for each pair of group levels and tests only
individual comparisons.
Related Information
• “Example of the Each Pair, Student’s t Test” on page 163
All Pairs, Tukey HSD
The All Pairs, Tukey HSD test (also called Tukey-Kramer) protects the significance tests of all combinations
of pairs, and the HSD intervals become greater than the Student’s t pairwise LSDs. Graphically, the
comparison circles become larger and differences are less significant.
Related Information
• “Example of the All Pairs, Tukey HSD Test” on page 165
With Best, Hsu MCB
The With Best, Hsu MCB test determines whether a mean can be rejected as the maximum or minimum
among the means. The Hsu’s MCB test is given for each level versus the maximum, and each level versus the
minimum.
The quantile that scales the LSD is not the same for each level. Therefore, the comparison circles technique
does not work as well, because the circles must be rescaled according to the level being tested (unless the