And so they're trying to form a connection between whether the cows are named and milk yield. And this would be a quantitative variable because you're measuring it in terms of number of liters. Milk yield, whether we are drawing a connection. And they're able to draw some form of a connection. They're saying, hey, when the cows were called by name, milk yield was 258 liters higher on average than on farms when this was not the case. So first, let's just think about what type of statistical study this is. And we could think, okay, is this a sample study?