Let's say it's an okay likelihood of getting a 3 or a 4. Let's say it's impossible to get a 5. Let's say it's very likely to get a 6 like that. So that's my probability distribution function. If I were to draw a mean, this is symmetric, so maybe the mean would be something like that. It would be halfway, so that would be my mean right there, the standard deviation. Maybe it would be that far and that far above and below the mean.