condition mean min max ZT0-3 0.44652396650000004 0.222107645 0.670940288 ZT4-7 1.168513521 0.6085203095 1.7285067325 ZT8-11 1.75088685525 1.7242898495 1.7774838610000003 ZT12-15 1.70040177675 1.5197376275 1.8810659259999998 ZT16-19 1.289900683 1.2635458535 1.3162555125000002 ZT20-23 1.2343352159999998 1.167578187 1.301092245