condition mean min max ZT0-3 10.95 10.95 10.95 ZT4-7 7.8 7.8 7.8 ZT8-11 10.850000000000001 10.850000000000001 10.850000000000001 ZT12-15 37.35 37.35 37.35 ZT16-19 8.65 8.65 8.65 ZT20-23 12.75 12.75 12.75