Among the players that went to high school in New York and have won the MVP, what is their average height?
high school in New York refers to highSchool like '%New York%'; won the MVP refers to award = 'Most Valuable Player'; average height = Divide (Sum(height), Count(playerID))
SELECT AVG(T1.height) FROM players AS T1 INNER JOIN awards_players AS T2 ON T1.playerID = T2.playerID WHERE T2.award = 'Most Valuable Player' AND T1.birthCity = 'New York'