condition mean min max ZT0-3 959.860136 959.860136 959.860136 ZT4-7 738.9617145 738.9617145 738.9617145 ZT8-11 428.41164849999996 428.41164849999996 428.41164849999996 ZT12-15 275.66589799999997 275.66589799999997 275.66589799999997 ZT16-19 135.811203 135.811203 135.811203 ZT20-23 118.155078 118.155078 118.155078