And I did this ahead of time just to save time. Sample standard deviation is 1.04. And we don't know anything about the population distribution. The thing that we've been doing from the get go is estimating that character with our sample standard deviation. So we've been estimating the true standard deviation of the population with our sample standard deviation. Now, in this problem, this exact problem, we're going to run into a problem. We're estimating our standard deviation with an n of only 7.