condition mean min max ZT0-3 48.297509794999996 44.23411645 52.36090314 ZT4-7 24.795580455 23.97420524 25.61695567 ZT8-11 20.501853760000003 19.996580155 21.007127365000002 ZT12-15 15.6535305925 14.55389112 16.753170065 ZT16-19 22.1654201725 18.631042405 25.69979794 ZT20-23 42.3076751325 34.805654125000004 49.80969614