Hierarchical models, or multilevel models, are used to represent data that might vary on, you guessed, different levels. Michael Freeman, from the University of Washington Information School, provides an introduction to the method using a scrolling format. The transitions give a good sense of how the model can change, depending on your approach.
Visual explainer for hierarchical modeling
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We looked at prime dating age and when people usually marry. Now it’s time for the next step in the circle of life.
One Drink Per Day, Your Chances of Developing an Alcohol-Related Condition
While a drink a day might increase your risk of experiencing an alcohol-related condition, the change is low in absolute numbers.