A software development company created a new app for fitness, and they want to determine if using the app can lead to weight loss and increased strength in customers. Should they run an observational study or experiment?

Welcome back. For this problem, we have a software development company creating a new app for fitness, and they want to determine if using the app can lead to weight loss and increased strength in customers. We wanna know should they run an observational study or an experiment. As a reminder, in an observational study, we can collect information on the current state of things. And in an experiment, we can see how a change affects a situation. In this case, the software development company is interested in how a change using the fitness app can affect their customers' fitness, looking at weight loss and increased strength. So in this case, because they're interested in a change, they should run an experiment. Great work.