So in this case, instead of just taking 4 samples from my original crazy distribution, every sample, I take 20 instances of my random variable and I average those 20, and then I plot the sample mean on here. So in that case, I'm going to have a distribution that looks like this. And we'll discuss this in more videos. But it turns out if I were to plot the sample, 10,000 of the sample means here, I'm going to have something that, two things, it's going to even more closely approximate a normal distribution, and we're going to see in future videos it's actually going to have a smaller, well, let me be clear, it's going to have the same mean. So that's the mean, this is going to have the same mean. But it's going to have a smaller standard deviation. So I want to, well, I should plot these from the bottom because you kind of stack it.