condition mean min max ZT0-3 146.05 146.05 146.05 ZT4-7 68.2 68.2 68.2 ZT8-11 66.95 66.95 66.95 ZT12-15 61.2 61.2 61.2 ZT16-19 117.45 117.45 117.45 ZT20-23 97.75 97.75 97.75