And just so you know how I calculated everything, and I really want you to play with this and play with the formula and get an intuitive feeling for this, the cumulative distribution function, and think a lot about how it relates to the binomial distribution, and I covered that in the last video. To plot this, I just took each of these points. I went to plot the points between minus 20 and 20, and I just incremented by 1. I just decided to increment by 1. So this isn't a continuous curve. It's actually just plotting a point at each point and connecting it with a line. Then I did the distance between each of those points and the mean.