You can see that we know t distributions are symmetric around their mean, so whatever value this is, if this number is 2, then this value is just going to be negative 2. We just have to keep that in mind, but the t tables actually help us figure out this value. Let's figure out a t value where the probability of getting a t value below that is 99%. Once again, this is going to be a one-sided situation. Let's look at that over here. One-sided, this is just straight from Wikipedia, we want the cumulative distribution below that t value to be 99%. We have it right over here, 99%.