condition mean min max ZT0-3 42.341966666666664 40.5272 43.6335 ZT4-7 45.40395 45.40395 45.40395 ZT8-11 52.27525 52.27525 52.27525 ZT12-15 71.82855 68.0891 75.568 ZT16-19 49.3899 49.3899 49.3899 ZT20-23 53.57325 53.57325 53.57325