condition mean min max ZT0-3 110.648232 110.648232 110.648232 ZT4-7 90.3390655 90.3390655 90.3390655 ZT8-11 107.15052850000001 107.15052850000001 107.15052850000001 ZT12-15 91.65215 91.65215 91.65215 ZT16-19 91.282101 91.282101 91.282101 ZT20-23 61.613935999999995 61.613935999999995 61.613935999999995