So just to review what we're doing, we're assuming the null hypothesis. There's no difference. If we assume there's no difference, then the sampling distribution of this statistic right here is going to have a mean of 0, and the result that we actually got for this statistic has a z-score of 2.34. Or this is equivalent to being 2.34 standard deviations away from this mean of 0. So in order to reject the null hypothesis, that has to be less probable than our significance level. And to see that, let's see what the minimum z-score we need to reject our hypothesis. So let's think about that a second.