condition mean min max ZT0-3 0.17727983875 0.0978223455 0.256737332 ZT4-7 0.7512364177499999 0.1429807675 1.359492068 ZT8-11 14.02264475875 8.4904575415 19.554831976 ZT12-15 39.2336236325 25.226354705 53.24089256 ZT16-19 47.5609986275 45.91830935 49.203687904999995 ZT20-23 16.9500135525 9.77774241 24.122284694999998