condition mean min max ZT0-3 19.3028775725 16.511017025 22.09473812 ZT4-7 16.54983527725 11.7487889695 21.350881585 ZT8-11 20.71897338 20.039813575 21.398133185 ZT12-15 35.2852686 27.958975955 42.611561245000004 ZT16-19 46.549016025 43.133631345 49.964400705 ZT20-23 87.65676878 54.538804170000006 120.77473339