We've already been introduced to the chi-squared statistic in other videos. Now we're going to use it for a test for homogeneity. And homogeneity or homogeneity, in everyday language, this means how similar things are. And that's what we're essentially going to test here. We're gonna look at two different groups and see whether the distributions of those groups for a certain variable are similar or not. And so the question I'm going to think about or we're going to think about together in this video is, let's say we were thinking about left-handed versus right-handed people. And we're wondering, do they have the same preferences for subject domains?