So it's a member of chi-squared, and since we're only taking one sum over here, we're only taking the sum of one independent, standard normally distributed variable, we say that this only has one degree of freedom. And we write that over here. So this right here is our degree of freedom. We have one degree of freedom right over there. Now, if we defined, so let's call this q1. Let's say I have another random variable. Let's call this q, let me do it in a different color.