So let's look at the distribution of sample proportions. So you could literally look at every combination of getting 150 households from this, and you would actually get a binomial distribution. And we've also seen this before. You would actually get a binomial distribution where you'd get a bunch of bars like that. But if your n is suitably large, and in particular, and this is kind of the test for it, the test if n times p, and in this case, we're saying p is 30%, if n times p is greater than 5, and n times 1 minus p is greater than 5, you can assume that the distribution of the sample proportion is going to be normal. So if you looked at all of the different ways you could sample 150 households from this population, you'd get all of these bars. 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.