condition mean min max ZT0-3 1.0243115 0.8363245 1.2122985 ZT4-7 1.3258334999999999 1.3258334999999999 1.3258334999999999 ZT8-11 1.2123819999999998 1.2123819999999998 1.2123819999999998 ZT12-15 0 0 0 ZT16-19 0.596302 0.596302 0.596302 ZT20-23 0.959519 0.959519 0.959519