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In SAS, how can I conduct a t-test on data sorted by variables?

In SAS, to conduct a t-test on data sorted by variables, use the BY statement in the TTEST procedure. The following example tests gender difference in weight in each area:

PROC SORT DATA=deer; BY area; PROC TTEST; CLASS female; VAR weight; BY area; RUN;

You must sort the data by the variable area before using the BY statement in PROC TTEST. The CLASS statement specifies a binary group variable, and the VAR statement indicates the variable(s) to be compared.

If you have questions about using statistical and mathematical software at Indiana University, email UITS Research Analytics (formerly known as the Stat/Math Center). Research Analytics is located on the IU Bloomington campus at 410 N. Park Avenue and is open for consultation by appointment Monday-Friday 9am-5pm. For more, visit Research Analytics on the web, or call 812-855-4724 (IUB) or 317-278-4740 (IUPUI).

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Last modified on September 19, 2012.

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