Actually, I wrote the standard deviation here in the last video, that should be the mean. And let's say it has some variance. I could write it like that, or I could write the standard deviation there. But as long as it has a well-defined mean and standard deviation, I don't care what the distribution looks like. What I can do is take samples in the last video of, say, size 4. So that means I take literally four instances of this random variable. This is one example.