Remember, the sample, our true mean is this, that the Greek letter mu is your true mean. This is equal to the mean, while an X with a line over it means sample mean. Sample mean. So here, what we're saying is this is the variance of our sample means. Now, this is gonna be a true distribution. This isn't an estimate. This is, there's some, you know, if we magically knew this distribution, there's some true variance here.