condition mean min max ZT0-3 5.3 5.3 5.3 ZT4-7 5.1 5.1 5.1 ZT8-11 9.9 9.9 9.9 ZT12-15 4.2 4.2 4.2 ZT16-19 5.0 5.0 5.0 ZT20-23 3.5999999999999996 3.5999999999999996 3.5999999999999996