And then I divide by my number of observations. So this is my sample mean. This is the mean of all of the observations I've made. The law of large numbers just tells us that my sample mean will approach my expected value of the random variable. Or I could also write it as my sample mean will approach my population mean for n approaching infinity. And I'll be a little informal with what is approach or what is convergence mean, but I think you have the general intuitive sense that if I take a large enough sample here, that I'm going to end up getting the expected value of the population as a whole. And I think to a lot of us that's kind of intuitive, that if I do enough trials that over large samples, that the trials would kind of give me the numbers that I would expect given the expected value and the probability of all that.