condition mean min max ZT0-3 38.195001 38.195001 38.195001 ZT4-7 19.469071 19.469071 19.469071 ZT8-11 25.390639 25.390639 25.390639 ZT12-15 43.2943965 43.2943965 43.2943965 ZT16-19 38.7717605 38.7717605 38.7717605 ZT20-23 80.109018 80.109018 80.109018