Let me get a calculator out to calculate this. We have 142 divided by 250 is equal to 0.568. Our sample proportion is 0.568, or 56.8% either one. 0.568. Let's also figure out our sample variance, because we can use it later for building our confidence interval. Our sample variance here, we're going to take the weighted sum of the squared differences from the mean and divide by this minus 1. We can get the best estimator of the true variance.