And this is a preview of actually a normal distribution that I've plotted. The purple line right here is the normal distribution. And just so you know, the whole exercise here, I know I jump around a little bit, is to show you that the normal distribution is a good approximation for the binomial distribution and vice versa. If the binomial distribution, if you take enough trials in your binomial distribution, we'll touch on that in a second, but the intuition of this term right here I think is interesting. Because we're saying how far are we away from the mean? We're dividing by the standard deviation. We're saying, so this whole term right here is how many standard deviations we are away from the mean.