condition mean min max ZT0-3 233.05 233.05 233.05 ZT4-7 194.9 194.9 194.9 ZT8-11 180.55 180.55 180.55 ZT12-15 154.7 154.7 154.7 ZT16-19 166.7 166.7 166.7 ZT20-23 223.25 223.25 223.25