And we'll talk about later why six might not be as large of a sample as you would like. But you survey how much TV these folks watch. And you get that you find one person who watched 1 and 1 half hours, another person watched 2 and 1 half hours, another person watched 4 hours. And then you get one person who watched 2 hours. And then you get two people who watched 1 hour each. So given this data from your sample, what do you get as your sample mean? Well, the sample mean, which we would denote by lowercase x with a bar over it, it's just the sum of all of these divided by the number of data points we have.