So here, your variance is going to be 20 divided by 20, which is equal to one. This is the variance of your original probability distribution, and this is your N. What's your standard deviation gonna be? What's gonna be the square root of that? Standard deviation is gonna be the square root of one, well, that's also going to be one. So we could also write this. We could take the square root of both sides of this and say the standard deviation of the sampling distribution of the, of the standard deviation of the sampling distribution of the sample mean, it's often called the standard deviation of the mean, and it's also called, I'm gonna write this down, the standard error of the mean, standard error of the mean. All of these things that I just mentioned, these all just mean the standard deviation of the sampling distribution of the sample mean.