condition mean min max ZT0-3 149.85 149.85 149.85 ZT4-7 125.2 125.2 125.2 ZT8-11 107.35 107.35 107.35 ZT12-15 144.2 144.2 144.2 ZT16-19 176.05 176.05 176.05 ZT20-23 139.9 139.9 139.9