condition mean min max ZT0-3 474.35 474.35 474.35 ZT4-7 406.5 406.5 406.5 ZT8-11 558.8 558.8 558.8 ZT12-15 623.7 623.7 623.7 ZT16-19 743.75 743.75 743.75 ZT20-23 872.5 872.5 872.5