condition mean min max ZT0-3 218.10805 218.10805 218.10805 ZT4-7 112.1652905 112.1652905 112.1652905 ZT8-11 161.02325 161.02325 161.02325 ZT12-15 213.999848 213.999848 213.999848 ZT16-19 376.21898999999996 376.21898999999996 376.21898999999996 ZT20-23 363.9412595 363.9412595 363.9412595