It's going to be the standard deviation of our population distribution. So that standard deviation is going to be that distance over there. So there's some standard deviation associated with this distribution. It's going to be that standard deviation divided by the square root of our sample size. And we saw many videos ago why that at least experimentally makes sense, or why it intuitively makes sense. So it's going to be the square root of 100. So it's going to be this guy divided by 10.