condition mean min max ZT0-3 27.571824999999997 25.1585 29.985149999999997 ZT4-7 30.8291 30.8291 30.8291 ZT8-11 43.936099999999996 43.936099999999996 43.936099999999996 ZT12-15 0 0 0 ZT16-19 51.62705 51.62705 51.62705 ZT20-23 44.45205 44.45205 44.45205