Slots vs Dice: join the experiment

I feel the dice game is definitely loaded, but not necessarily in a way that's against us. I think the odds of getting certain numbers changes depending on what number you choose (for example, choosing 7 means you're much more likely to roll a 7. But when you choose another number, like 12, you're much less likely to see a 7 and maybe even more likely to see a 12 despite the chance of rolling a 7 being the highest).

So if any calculations are to be done, it has to be done with the same number choice (so choose 1, twenty times, and see what the chance of rolling a 1 is, and do the same for each number). This way, we can figure out what is the optimal number choice, and see whether it truly is better or worse than slots (which seems a bit more random to me).