condition mean min max ZT0-3 1.65 1.65 1.65 ZT4-7 4.0 4.0 4.0 ZT8-11 25.65 25.65 25.65 ZT12-15 2.55 2.55 2.55 ZT16-19 2.35 2.35 2.35 ZT20-23 3.5999999999999996 3.5999999999999996 3.5999999999999996