Our z score, the number of standard deviations that our actual result is away from the mean, the actual difference that we sampled in the last few videos between the men and the women, was 0.051. And from that, we're going to subtract the assumed mean. Remember, we're assuming that these two things are equal. So the mean of this sampling distribution right here is 0. So we're just going to subtract 0. And then we have to divide this by the standard deviation of the sampling distribution of this statistic right here. So the sampling distribution of this statistic, p1 minus p2.