And just to be clear, when we got this sample mean here, this sample proportion, we just sampled it. You could view it as taking a sample from this distribution over here. When we got this sample proportion, it was like taking a sample from this over here. We took 591, or we took 1,000 samples from this when we took their mean, where it's equivalent to taking a sample from the sampling distribution. Now, this distribution over here is going to be the distribution of all of the differences of the sampling proportions, or of the sample proportions. And so it will look like this. It will have some mean value.