condition mean min max ZT0-3 53.470557 53.470557 53.470557 ZT4-7 71.3079985 71.3079985 71.3079985 ZT8-11 49.840351 49.840351 49.840351 ZT12-15 52.5317295 52.5317295 52.5317295 ZT16-19 40.682185000000004 40.682185000000004 40.682185000000004 ZT20-23 34.775382 34.775382 34.775382