Question: The 2015–16 Xavier Musketeers women's basketball team represented Xavier University during the 2015–16 NCAA Division I women's basketball season, they were third year members of the newly reorganized Big East Conference, a collegiate athletic conference that competes in NCAA Division I in all sports except football, and has been officially recognized as a Division I multi-sport conference, effective on which date?
Sentence (from "2015–16 Xavier Musketeers women's basketball team"): They finished the season 17–13, 8–10 in Big East play to finish in a tie for seventh place.
Relevant evidence: No