condition mean min max ZT0-3 3157.924364 3157.924364 3157.924364 ZT4-7 3049.5577595 3049.5577595 3049.5577595 ZT8-11 3440.145112 3440.145112 3440.145112 ZT12-15 3287.0484800000004 3287.0484800000004 3287.0484800000004 ZT16-19 2869.959806 2869.959806 2869.959806 ZT20-23 2234.5211225000003 2234.5211225000003 2234.5211225000003