condition mean min max ZT0-3 2414.75 2414.75 2414.75 ZT4-7 2227.0 2227.0 2227.0 ZT8-11 2299.0 2299.0 2299.0 ZT12-15 2485.75 2485.75 2485.75 ZT16-19 2642.45 2642.45 2642.45 ZT20-23 2521.3999999999996 2521.3999999999996 2521.3999999999996