condition mean min max ZT0-3 0.8999999999999999 0.8999999999999999 0.8999999999999999 ZT4-7 0.3 0.3 0.3 ZT8-11 2.15 2.15 2.15 ZT12-15 1.7 1.7 1.7 ZT16-19 9.75 9.75 9.75 ZT20-23 6.1 6.1 6.1