condition mean min max ZT0-3 97.104943 97.104943 97.104943 ZT4-7 128.450788 128.450788 128.450788 ZT8-11 151.3665605 151.3665605 151.3665605 ZT12-15 134.631836 134.631836 134.631836 ZT16-19 104.134649 104.134649 104.134649 ZT20-23 107.37905599999999 107.37905599999999 107.37905599999999