condition mean min max ZT0-3 562.85 562.85 562.85 ZT4-7 634.8 634.8 634.8 ZT8-11 599.95 599.95 599.95 ZT12-15 827.05 827.05 827.05 ZT16-19 1017.25 1017.25 1017.25 ZT20-23 782.5 782.5 782.5