condition mean min max ZT0-3 46.037044 46.037044 46.037044 ZT4-7 52.457347999999996 52.457347999999996 52.457347999999996 ZT8-11 76.51494600000001 76.51494600000001 76.51494600000001 ZT12-15 63.60919799999999 63.60919799999999 63.60919799999999 ZT16-19 74.942543 74.942543 74.942543 ZT20-23 56.54155 56.54155 56.54155