Histograms (that at infinity should form a Probability Density Function - but we have have only ~60-70 points) show an interesting behavior at 0.3-0.5 and 0.6-0.8 (and specially 0.82-0.83).
Priviet!
I did something like this long time ago (
https://bitcointalk.org/index.php?topic=1306983.msg54879435#msg54879435)
BUT: it makes no sense!
Somewhere (I do not have time to search for the post) author stated that he generated random private keys and then replaced the beginning with ZEROs, just to keep incrementing ranges. So any statistical approach is useless IMHO.