condition mean min max ZT0-3 5.45 5.45 5.45 ZT4-7 6.6 6.6 6.6 ZT8-11 1.6500000000000001 1.6500000000000001 1.6500000000000001 ZT12-15 21.15 21.15 21.15 ZT16-19 1.75 1.75 1.75 ZT20-23 0.8500000000000001 0.8500000000000001 0.8500000000000001