reg ns;
foreach n in (T(100,1000,10000)){
   ns=(0).pump(n,List,(0.0).random.fp(1.0));
   println("N:%,6d  mean:%.5f std dev:%.5f".fmt(n,mean(ns),stdDev(ns)));
}
foreach r in ([0.0 .. 0.9, 0.1]){  // using the last data set (10000 randoms)
   n:=ns.filter('wrap(x){ r<=x<(r+0.1) }).len();
   println("%.2f..%.2f:%4d%s".fmt(r,r+0.1,n,"*"*(n/20)));
}