It is odd, Dale, to have only one winner when all the numbers picked are under 31. Second, track your state lottery draws and note how often just the numbers 1-31 occur. Fortunately for you, I did the homework by researching every draw of every game ever played in California. So for the above two reasons, Dale, I subjectively recommend random numbers, in addition to waiting for the lottery to get close to true odds. Believe me, he's no math genius and generally loses more than he wins.
Most people use statistics the way a drunk uses a lamp post.
More for support than illumination. Not anymore, Cliff. Though you'll see odds posted by Las Vegas bookmakers in nationwide newspapers, they're more for amusement, not actual wagering. That's too bad. Just think of the possibilities a sportsbook operator could offer.