condition mean min max ZT0-3 3.77143219375 3.2699107825000002 4.272953605 ZT4-7 2.0546208735000002 1.9120840695 2.1971576775 ZT8-11 2.387441471 2.2932953815 2.4815875605 ZT12-15 3.0816348315 2.4755975115 3.6876721515 ZT16-19 2.76883185475 2.2568237735 3.280839936 ZT20-23 6.194892545249999 4.924096865999999 7.4656882245