condition mean min max ZT0-3 301.078211 301.078211 301.078211 ZT4-7 451.343263 451.343263 451.343263 ZT8-11 553.1647740000001 553.1647740000001 553.1647740000001 ZT12-15 596.246871 596.246871 596.246871 ZT16-19 447.297773 447.297773 447.297773 ZT20-23 230.140658 230.140658 230.140658