SAS Tips

(1)

proc reg data = want /rinfluence;

can omit the outlier effect

(2) Winsorize Code

https://communities.sas.com/thread/36963

(3) two groups TTEST

https://www.youtube.com/watch?v=ULq9kQtIDMQ

proc ttest data=want;
 paired next_AT*control_next_AT;
run;