So let's say I have a random variable X. And we know its expected value or its population mean. The law of large numbers just says that if we take a sample of n observations of our random variable, and if we were to average all of those observations, and let me define another variable, let's call that X sub n with a line on top of it, this is the mean of n observations of our random variable. So it's literally, this is my first observation. So you could kind of say I run the experiment once and I get this observation and I run it again, I get that observation. And I keep running it n times. And then I divide by my number of observations.