condition mean min max ZT0-3 34.02265 34.02265 34.02265 ZT4-7 29.867449999999998 29.867449999999998 29.867449999999998 ZT8-11 38.47535 38.47535 38.47535 ZT12-15 34.014849999999996 34.014849999999996 34.014849999999996 ZT16-19 46.73309999999999 46.73309999999999 46.73309999999999 ZT20-23 36.36035 36.36035 36.36035