options nodate nonumber;
Title 'Time between failures';

data failure;
infile "c:/failtime.txt";
input time;
timecent=time-20;
label time = 'time between failures' timecent = time-20 hours;

*proc print;
*run;
proc means mean std stderr clm p25 p50 p75;
var time;
run;
proc univariate normal;
var timecent;
histogram /cfill=WHITE pfill=SOLID name='HIST' normal; 
probplot/normal(mu=est sigma=est color=BLUE l=1 w=1);
run;