So just here, based on our sample proportions or our sample means, it looks like there is a difference, but we still have to come up with our confidence interval. And let's just make sure we understand what we just did. We just found, so we could figure out a sample proportion over here for the men, so the sample proportion here for the men, which is really just the sample mean of this sample right over here. We have 642 1s, the rest are 0, so we have 642 in the numerator. We have 1,000 samples. 642 divided by 1,000 is 0.642. So you could view this as a sample mean or as a sample proportion.