So if I were to ask you if this is our distribution, let me pick this blue one right here. So over here we have 2 degrees of freedom, because we're adding 2 of these guys right here. If I were to ask you what is the probability of Q2 being greater than 2.41? And I'm picking that value for a reason. So I want the probability of Q2 being greater than 2.41. What I want to do is I'll look at a chi squared table like this. Q2 is a version of chi squared with 2 degrees of freedom.