condition mean min max ZT0-3 62.8416 27.2716 87.69215 ZT4-7 25.7699 25.7699 25.7699 ZT8-11 23.1321 23.1321 23.1321 ZT12-15 38.702650000000006 36.334 41.0713 ZT16-19 51.0734 51.0734 51.0734 ZT20-23 79.37115 79.37115 79.37115