condition mean min max ZT0-3 0.75 0.75 0.75 ZT4-7 0.5 0.5 0.5 ZT8-11 0.85 0.85 0.85 ZT12-15 4.45 4.45 4.45 ZT16-19 20.75 20.75 20.75 ZT20-23 2.1500000000000004 2.1500000000000004 2.1500000000000004