condition mean min max ZT0-3 41.378853 41.378853 41.378853 ZT4-7 63.1088485 63.1088485 63.1088485 ZT8-11 38.856339000000006 38.856339000000006 38.856339000000006 ZT12-15 138.3709665 138.3709665 138.3709665 ZT16-19 52.263628999999995 52.263628999999995 52.263628999999995 ZT20-23 75.2663475 75.2663475 75.2663475