And so the sampling distribution of the sample mean, let me write it over here. So this is the sampling distribution of the sample mean, it has some mean here. And I can denote it with the mu sub x bar. This tells us this is the mean of the sampling of the sample distribution. But we know from many, many videos that this is going to be the same thing as the population mean that we are sampling from, that each sample comes from, each of these 100 samples come from. So this is going to be equal to mu, which is going to be equal to p. So this is going to be equal to mu, which is equal to p. Now, this variance over here, the variance of this distribution, let me draw it like this. Or even better, let's say the standard deviation of this distribution.