condition mean min max ZT0-3 3.5999999999999996 3.5999999999999996 3.5999999999999996 ZT4-7 1.2 1.2 1.2 ZT8-11 1.95 1.95 1.95 ZT12-15 1.25 1.25 1.25 ZT16-19 2.25 2.25 2.25 ZT20-23 2.15 2.15 2.15