condition mean min max ZT0-3 17.53 16.8227 18.2373 ZT4-7 15.223700000000001 15.223700000000001 15.223700000000001 ZT8-11 13.571349999999999 13.571349999999999 13.571349999999999 ZT12-15 0 0 0 ZT16-19 15.42525 15.42525 15.42525 ZT20-23 16.914299999999997 16.914299999999997 16.914299999999997