An example dataset to use with the diversity-based assignment model.
Format
dba_gc_ex001
A data frame with 4 rows and 4 columns.
id: the student id of each students, simply the integers 1 to 4.
major: the primary major of each student.
skill: the skill level of each student.
groups: the self-formed groups submitted by each student. In this case, student is in his/her own group.