So the population mean, they will denote it with mu. We already talked about that. And here, once again, you're gonna take the sum, but this time it's going to be the sum of all of the elements in your population. So your x sub i's, and you'll still start at i equals one, but it usually gets denoted that, hey, you're taking the whole population. So they'll often put a capital N right over here to somehow denote that this is a bigger number than maybe this smaller n. But once again, we are not done. We have to divide by the number of data points that we are actually summing. And so this, once again, is the same thing as x sub one plus x sub two plus x sub three all the way to x sub capital N, all of that divided by our capital N. And once again, in this situation, we found this practical, we found this impractical.