/** Two-Sample t tests using raw data, cutting blade example **/

/***********************************************************
Data are found in sasdata.blades2
Two-sided test:
***********************************************************/
proc ttest data=sasdata.blades2 alpha=.1;
 class manufacturer;
 var y;
 ods select Ttest;
run;
* Gives p-minus;
proc ttest data=sasdata.blades2 alpha=.1 sides=l;
 class manufacturer;
 var y;
 ods select Ttest;
run;
* Gives p-plus;
proc ttest data=sasdata.blades2 alpha=.1 sides=u;
 class manufacturer;
 var y;
 ods select Ttest;
run;