condition mean min max ZT0-3 1544.553404 331.98247139999995 2757.1243366 ZT4-7 6251.804007 5556.12882 6947.479194 ZT8-11 5923.33435525 5046.5594545 6800.109256 ZT12-15 1026.8312194799998 209.32376075999997 1844.3386781999998 ZT16-19 300.2070927725 199.441081645 400.9731039 ZT20-23 382.622854125 251.38214175000002 513.8635665