condition mean min max ZT0-3 76.869325 76.04525 77.6934 ZT4-7 90.02855 90.02855 90.02855 ZT8-11 84.1962 84.1962 84.1962 ZT12-15 0 0 0 ZT16-19 118.1675 118.1675 118.1675 ZT20-23 102.3035 102.3035 102.3035