I want to generate my own private key with dice and/or other very entropic phenomenon. But how can I calculate if my data have a good entropy ? I mean if I throw dice in a certain way too much time maybe my outcome will not be trully random, maybe my dice is not a very good dice and have imperfection etc.
So can I just throw it 300+ and if I don't have 0.166666% each result (1,2,3,4,5,6) it's not good ?
Also I want to write my own series of dice result just to compare how deficient is my brain when I try to generate true randomness.