condition mean min max ZT0-3 501.45 501.45 501.45 ZT4-7 583.8 583.8 583.8 ZT8-11 508.04999999999995 508.04999999999995 508.04999999999995 ZT12-15 764.75 764.75 764.75 ZT16-19 613.2 613.2 613.2 ZT20-23 474.20000000000005 474.20000000000005 474.20000000000005