So just based on what we see, it says maybe you lose an incremental 1.91 pounds every 4 months if you are on this diet. What we want to do in this video is to get a 95% confidence interval around this number to see that in that 95% confidence interval, maybe do we always lose weight? Or is there a chance that we can actually go the other way with the low-fat diet? So really, just this video, 95% confidence interval. In the next video, we'll actually do a hypothesis test using this same data. Now to do a 95% confidence interval, let's think about the distribution that we're thinking about. So let's look at the distribution.