Once again, we don't have to assume that it's normal, because we're going to assume when we go to the next level that when we take the samples, we're taking enough samples that the central limit theorem will actually apply. But with that said, let's think about the sampling distributions of each of these random variables. So let's think about the sampling distribution of the sample mean of X. When the sample size, and let's say the sample size over here is going to be equal to n. And actually over here, I'm going, well I'll stay in green right now. So what is that going to look like? Well it's going to be some distribution. And now we're assuming that n is a fairly large number.