condition mean min max ZT0-3 2.04198 1.275615 2.808345 ZT4-7 1.7408649999999999 1.7408649999999999 1.7408649999999999 ZT8-11 0.8501289999999999 0.8501289999999999 0.8501289999999999 ZT12-15 0 0 0 ZT16-19 3.0245699999999998 3.0245699999999998 3.0245699999999998 ZT20-23 3.47973 3.47973 3.47973