condition mean min max ZT0-3 0.85 0.85 0.85 ZT4-7 1.3 1.3 1.3 ZT8-11 9.75 9.75 9.75 ZT12-15 1.15 1.15 1.15 ZT16-19 1.35 1.35 1.35 ZT20-23 7.8500000000000005 7.8500000000000005 7.8500000000000005