/** Two-Sample 90% t Confidence Intervals using raw data **/
libname sasdata '\\storage.wpi.edu\academics\courses\MA\SAS-Data\sasdata8';
/***********************************************************
Data are found in sasdata.blades2. Output contains one-sample
t intervals for the mean of each group separately, as well as 
the pooled and Satterthwaite two-sample intervals for the difference 
of means. You can ignore the intervals for the standard deviations.
***********************************************************/
proc ttest data=sasdata.blades2 alpha=.1;
 class manufacturer;
 var y;
 ods select ConfLimits;
run;