condition mean min max ZT0-3 2667.6499999999996 2667.6499999999996 2667.6499999999996 ZT4-7 1596.6 1596.6 1596.6 ZT8-11 1547.15 1547.15 1547.15 ZT12-15 1992.9 1992.9 1992.9 ZT16-19 2680.6 2680.6 2680.6 ZT20-23 2685.2 2685.2 2685.2