condition mean min max ZT0-3 70.84581666666666 41.10895 88.8149 ZT4-7 0.0 0.0 0.0 ZT8-11 47.31945 47.31945 47.31945 ZT12-15 25.74125 0.0 51.4825 ZT16-19 0.0 0.0 0.0 ZT20-23 31.52545 31.52545 31.52545