Just like with our sampling bowl, the population parameter here will involve proportions. However, in this case it will be the difference in population proportions \(p_{seed} - p_{control}\), where \(p_{seed}\) is the proportion of all Americans who if exposed to yawning will yawn themselves, and \(p_{control}\) is the proportion of all Americans who if not exposed to yawning still yawn themselves. Correspondingly, the point estimate/sample statistic based the Mythbusters’ sample of participants will be the difference in sample proportions \(\widehat{p}_{seed} - \widehat{p}_{control}\). Let’s extend Table 7.5 of scenarios of sampling for inference to include our latest scenario.