foreach i in (N/2){ v1,v2:=norm2(); accum(v1); accum(v2); }
println("Samples: %,d".fmt(N));
println("Mean:    ", m:=sum/N);
println("Stddev:  ", (sumSq/N - m*m).sqrt());
foreach p in (h){ println("*"*(p/SCALE)) }