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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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1584 T-TEST<br />

PAIRS Subcommand<br />

PAIRS requests paired-samples t tests.<br />

• The minimum specification for a paired-samples test is PAIRS with an analysis list. Only<br />

numeric variables can be specified on the analysis list. The minimum analysis list is two<br />

variables.<br />

• If keyword WITH is not specified, each variable in the list is compared with every other<br />

variable on the list.<br />

• If keyword WITH is specified, every variable to the left of WITH is compared with every<br />

variable to the right of WITH. WITH can be used with PAIRED to obtain special pairing.<br />

• To specify multiple analysis lists, use multiple PAIRS subcommands, each separated by a<br />

slash. Keyword PAIRS is required only for the first analysis list; a slash can be used to<br />

separate each additional analysis list.<br />

(PAIRED) Special pairing for paired-samples test. PAIRED must be enclosed in parentheses<br />

and must be used with keyword WITH. When PAIRED is specified, The<br />

first variable before WITH is compared with the first variable after WITH, the<br />

second variable before WITH is compared with the second variable after<br />

WITH, and so forth. The same number of variables should be specified before<br />

and after WITH; unmatched variables are ignored and a warning message is<br />

issued. PAIRED generates an error message if keyword WITH is not specified<br />

on PAIRS.<br />

Example<br />

T-TEST PAIRS=TEACHER CONSTRUC MANAGER.<br />

T-TEST PAIRS=TEACHER MANAGER WITH CONSTRUC ENGINEER.<br />

T-TEST PAIRS=TEACHER MANAGER WITH CONSTRUC ENGINEER (PAIRED).<br />

• The first T-TEST compares TEACHER with CONSTRUC, TEACHER with MANAGER, and<br />

CONSTRUC with MANAGER.<br />

• The second T-TEST compares TEACHER with CONSTRUC, TEACHER with ENGINEER,<br />

MANAGER with CONSTRUC, and MANAGER with ENGINEER. TEACHER is not compared<br />

with MANAGER, and CONSTRUC is not compared with ENGINEER.<br />

• The third T-TEST compares TEACHER with CONSTRUC and MANAGER with ENGINEER.<br />

CRITERIA Subcommand<br />

CRITERIA resets the value of the confidence interval. Keyword CI is required. You can specify<br />

a value between 0 and 1 in the parentheses. The default is 0.95.<br />

MISSING Subcommand<br />

MISSING controls the treatment of missing values. The default is ANALYSIS.<br />

• ANALYSIS and LISTWISE are alternatives; however, each can be specified with INCLUDE.

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