And then the variance of this Bernoulli distribution is going to be these two proportions multiplied. So P2 times 1 minus P2. Now, what I want to do, and I think I said this at the beginning of the video, is I want to figure out if there's a meaningful difference between the way that the men will vote and the women will vote. I want to figure out is this meaningful? So is there a meaningful difference here? And what we're going to do in this video is try to come up with a 95% confidence interval for this parameter. This difference of parameters is still a parameter.