condition mean min max ZT0-3 53.850079 53.850079 53.850079 ZT4-7 57.120259 57.120259 57.120259 ZT8-11 49.4750915 49.4750915 49.4750915 ZT12-15 48.430544 48.430544 48.430544 ZT16-19 71.6231485 71.6231485 71.6231485 ZT20-23 75.9739795 75.9739795 75.9739795