So we have 13 degrees of freedom. So that is this row right over here. And if we want a 95% confidence level, then that means our tail probability, remember, if our distribution, let me see if I'll draw it really small, little small distribution right over here. So if you want 95% of the area in the middle, that means you have 5% not shaded in, and that's evenly divided on each side, so that means you have 2 1⁄2% at the tails, 2 1⁄2%. So what you wanna look for is a tail probability of 2 1⁄2%. So that is this right over here,.025, that's 2 1⁄2%. And so there you go, that is our critical value, 2.160.