condition mean min max ZT0-3 458.95000000000005 458.95000000000005 458.95000000000005 ZT4-7 583.7 583.7 583.7 ZT8-11 493.75 493.75 493.75 ZT12-15 557.55 557.55 557.55 ZT16-19 447.5 447.5 447.5 ZT20-23 363.55 363.55 363.55