State pages do not invent a new score. They summarize the scored metros and county records inside each state, label every median, and show exactly how much of the state each source covers.
Each ranking is recomputed from the state rollups in Postgres. The values are labelled medians, and every row shows the sample behind it.
States with at least five metro memberships; sorted by the median of published Zillow metro yields.
States with at least five metro memberships; sorted by the median Zillow metro home value.
This is not a state score. It is the median among at least five scored metros touching the state.
Multi-state metros appear in each member state. The metro count therefore measures markets available to explore, while the county count partitions the national county dataset exactly once.