condition mean min max ZT0-3 40.65260000000001 33.5157 47.789500000000004 ZT4-7 23.436149999999998 23.436149999999998 23.436149999999998 ZT8-11 30.100050000000003 30.100050000000003 30.100050000000003 ZT12-15 0 0 0 ZT16-19 34.52265 34.52265 34.52265 ZT20-23 29.976300000000002 29.976300000000002 29.976300000000002