Is Pythons random.randint statistically random?

Question

So I\'m testing an calculating the probabilities of certain dice rolls, for a game. The base case if that rolling one 10sided die.

I did a million samples of this,

Answer 1

These results are very close to what you'd expect, and there's a simple calculation you can do to check that. If you roll 1,000,000 D10s and count the number of 1s (say) the mean of that random variable is 100,000 (number of trials * probability of success) and the variance is 90,000 (number of trials * probability of success * probability of failure), so the standard deviation is sqrt(90,000)=300. So you should expect to get something about 300 away from 100,000, i.e. 10% +/- 0.03%.