condition mean min max ZT0-3 223.25 223.25 223.25 ZT4-7 216.3 216.3 216.3 ZT8-11 185.95 185.95 185.95 ZT12-15 154.75 154.75 154.75 ZT16-19 224.35 224.35 224.35 ZT20-23 252.5 252.5 252.5