So each of these, so this is my first sample. My sample size is 4. I'm using the statistic, the mean. I actually could have done it with other things. I could have done the mode, or the range, or other statistics, but the sampling distribution of the sample mean is the most common one. It's probably, in my mind, the best place to start learning about the central limit theorem, and even, frankly, sampling distribution. So that's what it's called.