So how can we figure out that area under this normal distribution using the empirical rule? Well, we know what this area is. We know what this area between minus one standard deviation and plus one standard deviation is. We know that that is 68%. And if that's 68%, then that means in the parts that aren't in that middle region, you have 32%. Because the area under the entire normal distribution is 100% or 100%, or 1%, depending on how you want to think about it, because you can't have all of the possibilities combined, it can only add up to 1. You can't have it more than 100% there.