I'm a tabletop RPG player, so i deal with chances of success a lot.

This one time, I saw a person roll below 10 on a d100 something like 27 times in sequence (it was an attack that as long as it hit dealt damage, and the CoS reduced gradually and floored at 10. So much damage...)

I also saw a session where every player rolled over 90 on every single d100 roll in like, 12 or so rolls. The session ended before anyone rolled under 90 because it had already going on for 4 hours.

So yeah if you do decide to do a test... Do it, like, 3 different days because who knows