condition mean min max ZT0-3 7.5486375 6.509675 8.5876 ZT4-7 5.865209999999999 5.865209999999999 5.865209999999999 ZT8-11 11.750399999999999 11.750399999999999 11.750399999999999 ZT12-15 0 0 0 ZT16-19 10.18215 10.18215 10.18215 ZT20-23 9.06119 9.06119 9.06119