The answer is "Today's older people are happier than college students."
A cross-sectional study is a kind of observational investigation that dissects information from a populace, or an agent subset, at a particular point in time, that is, cross-sectional data. Cross-sectional examinations are instinctively clear and take into consideration the examination of countless. The strategies can be institutionalized by the scientist, and obvious definitions can be connected to the presentation and the endpoints.