condition mean min max ZT0-3 26.64161191 25.718578100000002 27.564645719999998 ZT4-7 32.322607972499995 26.90903146 37.736184484999995 ZT8-11 38.220939709999996 37.706799454999995 38.735079965000004 ZT12-15 46.676668945 42.336028815000006 51.017309075 ZT16-19 54.045760924999996 48.58916411 59.50235774 ZT20-23 79.41957701000001 71.88130008 86.95785394