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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Goodbye, Mid-Range Shot
There’s a space on the basketball court called “mid-range.” It’s actually not off-limits. In fact, people used to shoot these so-called “mid-range” shots.
Population Growth and Seats Gained
The Census Bureau released state population counts for 2020. Here’s how each state gained and lost population and seats.
Age of Moms When Kids are Born
It’s a wide range, based on data from the National Center for Health Statistics.