Major grouping examples would be “arts and humanities”, “business”, “computer science”, “engineering”, “life sciences”, “physical sciences / math”, “social sciences” (there are others as well).
Admit and enroll GPA ranges (25th-75th percentile) look like they are based on UC-recalculated weighted-capped GPA. See GPA Calculator for the University of California – RogerHub for a calculator. Admit and yield rates are also shown.
The admit rate for UCI nursing was not much higher than the admit rate for UCLA nursing. UCI nursing also had the highest stat range of UCI major groupings.