So he samples 10 of them. One, two, three, four, five, six, seven, eight, nine, 10, and he finds that one out of those 10 are defective, 10% of the 10. So first of all, this is clearly a sample study. This is a sample study. How do we know that? Well, he is taking a sample from a broader population in order to estimate a parameter. The parameter is the percentage of those 100,000 duckies that are actually defective.