We did that in the last video. If you look for that, you get 97.975 right there. It's a z-score of 1.96. I even wrote it over there. So this critical z value is 1.96. So what that tells you is there is a 5% chance. So this tells us that there is a 5% chance of sampling a z statistic greater than 1.96, assuming the null hypothesis is correct.