We clearly have the four data points plotted, but let's plot the statistics for x. So the sample mean and the sample standard deviation for x are here in red. And actually, let me box these off in red so that you know that's what is going on here. So the sample mean for x, and it's easy to calculate, is one plus two plus two plus three divided by four is eight divided by four, which is two. So we have x equals two right over here. And then this is one sample standard deviation above the mean. This is one sample standard deviation below the mean.