condition mean min max ZT0-3 53.92636666666667 38.30970000000001 65.4645 ZT4-7 35.13615 35.13615 35.13615 ZT8-11 33.5934 33.5934 33.5934 ZT12-15 45.926275000000004 45.6704 46.18215 ZT16-19 49.3316 49.3316 49.3316 ZT20-23 79.5231 79.5231 79.5231