And to figure out that critical value, and remember, once again, we can use z-scores, and we can assume this is a normal distribution, because our sample size is large for either of those samples. We have a sample size of 100. And to figure that out, we just have to figure out, the first step is to say, well, if we just look at a normalized normal distribution like this, what is your critical z-value We're getting a result above that z-value only has a 5% chance, and to do that, so this is actually cumulative, so this whole area right over here is going to be 95% chance. We can just look at the z-table. We're going to look for 95%, because this is a one-tailed case, so let's look for 95%. This is the closest thing. We want to err on the side of being a little bit maybe to the right of this.