condition mean min max ZT0-3 0.579653 0.201565 0.7706885 ZT4-7 0.1900697 0.1900697 0.1900697 ZT8-11 0.42659800000000003 0.42659800000000003 0.42659800000000003 ZT12-15 1.22516775 1.0406355 1.4097 ZT16-19 1.3452 1.3452 1.3452 ZT20-23 1.124181 1.124181 1.124181