condition mean min max ZT0-3 49.113299999999995 49.113299999999995 49.113299999999995 ZT4-7 46.1453 46.1453 46.1453 ZT8-11 51.781000000000006 51.781000000000006 51.781000000000006 ZT12-15 51.47635 51.47635 51.47635 ZT16-19 62.51515 62.51515 62.51515 ZT20-23 52.3668 52.3668 52.3668