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The TTEST procedure now performs t tests for one sample, two samples,
and paired observations. The ALPHA= option in the PROC TTEST statement specifies
the alpha level for the confidence intervals produced. The CI= option specifies
that a confidence interval be produced for the standard deviation and that
the confidence interval be either an equal tailed confidence interval or an
interval based on the uniformly most powerful unbiased test of
![[IMAGE]](./images/leqn0.gif)
. The H0= option requests tests against m instead
of 0.
The FREQ and WEIGHT statements are now supported. The new PAIRED statement identifies the variables to be compared in paired comparisons.
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Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.