But since our n is pretty big, it's 150, and 150 times 0.3 is obviously greater than 5, 150 times 0.7 is also greater than 5. You can approximate that with a normal distribution. So let me do that. So you can approximate it with a normal distribution. So this is a normal distribution right over there. Now, the mean of the distribution of the proportion data that we're assuming is a normal distribution is going to be, and remember, we're working under the context that the null hypothesis is true. So this mean is going to be this mean right here.