And if it is, then we can use its mean and its standard deviation and create a normal distribution that has that same mean and standard deviation in order to approximate the probability that they're asking for. So first, this first part, how do we decide this? Well, the rule of thumb we have here, and it is a rule of thumb, is that if we take our sample size times our population proportion, and that is greater than or equal to 10, and our sample size times one minus our population proportion is greater than or equal to 10, then if both of these are true, then our sampling distribution of our sample proportions is going to be approximately normal. So in this case, the newspaper is asking 160 students. That's the sample size. So 160, the true population proportion is 0.15, and that needs to be greater than or equal to 10. And so let's see, this is going to be 16 plus eight, which is 24, and 24 is indeed greater than or equal to 10, so that checks out.