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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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ONEWAY 1165<br />

SIDAK Sidak t test. Used for pairwise comparison. This test provides tighter<br />

bounds than the Bonferroni test.<br />

GT2 Hochberg’s GT2. Used for pairwise comparison and for detecting<br />

homogeneity subsets. This test is based on the Studentized maximum<br />

modulus test. Unless the cell sizes are extremely unbalanced, this test<br />

is fairly robust even for unequal variances.<br />

GABRIEL Gabriel’s pairwise comparisons test based on the Studentized<br />

maximum modulus test. Used for pairwise comparison and for<br />

detecting homogeneity subsets.<br />

FREGW Ryan-Einot-Gabriel-Welsch’s multiple stepdown procedure based on<br />

an F test. Used for detecting homogeneity subsets.<br />

QREGW Ryan-Einot-Gabriel-Welsch’s multiple stepdown procedure based on<br />

the Studentized range test. Used for detecting homogeneity subsets.<br />

T2 Tamhane’s T2. Used for pairwise comparison. This test is based on a<br />

t test and can be applied in situations where the variances are unequal.<br />

T3 Tamhane’s T3. Used for pairwise comparison. This test is based on the<br />

Studentized maximum modulus test and can be applied in situations<br />

where the variances are unequal.<br />

GH Games and Howell’s pairwise comparisons test based on the Studentized<br />

range test. Used for pairwise comparison. This test can be applied<br />

in situations where the variances are unequal.<br />

C Dunnett’s C. Used for pairwise comparison. This test is based on the<br />

weighted average of Studentized ranges and can be applied in situations<br />

where the variances are unequal.<br />

WALLER(kratio) Waller-Duncan t test. Used for detecting homogeneity subsets. This<br />

test uses a Bayesian approach. The k-ratio is the Type 1/Type 2 error<br />

seriousness ratio. The default value is 100. You can specify an<br />

integer greater than 1 within parentheses.<br />

Example<br />

ONEWAY WELL BY EDUC6<br />

/POSTHOC=SNK SCHEFFE ALPHA=.01.<br />

• ONEWAY requests two different post hoc tests. The first uses the Student-Newman-Keuls<br />

test and the second uses Scheffé’s test. Both tests use an alpha of 0.01.<br />

RANGES Subcommand<br />

RANGES produces results for some post hoc tests. It is available only through syntax. You<br />

can always produce the same results using the POSTHOC subcommand.

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