Let's do another problem from the normal distribution section of ck12.org's AP Statistics book. And I'm using theirs because it's open source. It's actually quite a good book. The problems are, I think, good practice for us. So let's see, number three. You could go to their site, and I think you can download the book. Assume that the mean weight of one-year-old girls in the US is normally distributed with a mean of about 9.5 grams.