condition mean min max ZT0-3 99.043819 99.043819 99.043819 ZT4-7 51.381352500000006 51.381352500000006 51.381352500000006 ZT8-11 61.991819500000005 61.991819500000005 61.991819500000005 ZT12-15 91.442073 91.442073 91.442073 ZT16-19 275.156016 275.156016 275.156016 ZT20-23 289.366075 289.366075 289.366075